Fix UI tests.

We need to pass a CoordinatorLayout instead of a SwipeGestureLayout to
FenixSnackbar.make() in BaseBrowserFragment to prevent UI tests from
breaking. We also need to remove a few view IDs from the tab preview.

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -385,7 +385,7 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler, Session
                         tryAgain = downloadFeature::tryAgain,
                         onCannotOpenFile = {
                             FenixSnackbar.make(
-                                view = view,
+                                view = view.browserLayout,
                                 duration = Snackbar.LENGTH_SHORT,
                                 isDisplayedWithBrowserToolbar = true
                             )
@@ -649,7 +649,7 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler, Session
 
         val onCannotOpenFile = {
             FenixSnackbar.make(
-                view = view,
+                view = view.browserLayout,
                 duration = Snackbar.LENGTH_SHORT,
                 isDisplayedWithBrowserToolbar = true
             )
@@ -932,7 +932,7 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler, Session
 
                 view?.let { view ->
                     FenixSnackbar.make(
-                        view = view,
+                        view = view.browserLayout,
                         duration = FenixSnackbar.LENGTH_LONG,
                         isDisplayedWithBrowserToolbar = true
                     )
@@ -978,7 +978,7 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler, Session
             // Close find in page bar if opened
             findInPageIntegration.onBackPressed()
             FenixSnackbar.make(
-                    view = requireView(),
+                    view = requireView().browserLayout,
                     duration = Snackbar.LENGTH_SHORT,
                     isDisplayedWithBrowserToolbar = false
                 )

app/src/main/java/org/mozilla/fenix/browser/BrowserFragment.kt

@@ -258,7 +258,7 @@ class BrowserFragment : BaseBrowserFragment(), UserInteractionHandler {
                     }
                 }
                 FenixSnackbar.make(
-                    view = view,
+                    view = view.browserLayout,
                     duration = Snackbar.LENGTH_SHORT,
                     isDisplayedWithBrowserToolbar = true
                 )

app/src/main/java/org/mozilla/fenix/browser/TabPreview.kt

@@ -8,10 +8,11 @@ import android.content.Context
 import android.util.AttributeSet
 import android.view.Gravity
 import android.view.LayoutInflater
+import android.view.View
 import android.widget.FrameLayout
-import androidx.core.content.ContextCompat
 import androidx.core.content.res.ResourcesCompat
 import androidx.core.view.updateLayoutParams
+import kotlinx.android.synthetic.main.mozac_ui_tabcounter_layout.view.*
 import kotlinx.android.synthetic.main.tab_preview.view.*
 import mozilla.components.browser.thumbnails.loader.ThumbnailLoader
 import mozilla.components.support.images.ext.loadIntoView
@@ -44,12 +45,9 @@ class TabPreview @JvmOverloads constructor(
             )
         }
 
-        menuButton.setColorFilter(
-            ContextCompat.getColor(
-                context,
-                ThemeManager.resolveAttribute(R.attr.primaryText, context)
-            )
-        )
+        // Change view properties to avoid confusing the UI tests
+        tab_button.counter_box.id = View.NO_ID
+        tab_button.counter_text.id = View.NO_ID
     }
 
     override fun onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int) {

app/src/main/res/layout/tab_preview.xml

@@ -2,7 +2,9 @@
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<merge xmlns:android="http://schemas.android.com/apk/res/android" >
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
     <mozilla.components.browser.tabstray.thumbnail.TabThumbnailView
         android:id="@+id/previewThumbnail"
         android:layout_width="match_parent"
@@ -23,10 +25,10 @@
             android:id="@+id/toolbar_wrapper"
             android:layout_width="0dp"
             android:layout_height="40dp"
+            android:layout_gravity="center"
             android:layout_marginStart="8dp"
             android:layout_marginEnd="0dp"
             android:layout_weight="1"
-            android:layout_gravity="center"
             android:background="@drawable/home_search_background" />
 
         <org.mozilla.fenix.components.toolbar.TabCounter
@@ -35,10 +37,13 @@
             android:layout_height="48dp"
             android:layout_gravity="center" />
 
-        <mozilla.components.browser.menu.view.MenuButton
+        <androidx.appcompat.widget.AppCompatImageView
             android:id="@+id/menuButton"
             android:layout_width="36dp"
             android:layout_height="48dp"
-            android:layout_gravity="center" />
+            android:layout_gravity="center"
+            android:scaleType="center"
+            app:srcCompat="@drawable/ic_menu"
+            app:tint="?primaryText" />
     </LinearLayout>
 </merge>