For #6145: Switch drawableTint to app compat version. (#6151)

The property android:drawableTint doesn't work on older Android devices,
so I switched to the appcompat version (app:drawableTint).

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

@@ -18,7 +18,7 @@
         android:background="?android:attr/selectableItemBackgroundBorderless"
         android:drawableStart="@drawable/mozac_ic_back"
         android:drawablePadding="8dp"
-        android:drawableTint="@color/neutral_text"
+        app:drawableTint="@color/neutral_text"
         android:gravity="start|center_vertical"
         android:text="@string/create_collection_select_tabs"
         android:textAppearance="@style/HeaderTextStyle"

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

@@ -18,7 +18,7 @@
         android:background="?android:attr/selectableItemBackgroundBorderless"
         android:drawableStart="@drawable/mozac_ic_back"
         android:drawablePadding="8dp"
-        android:drawableTint="@color/neutral_text"
+        app:drawableTint="@color/neutral_text"
         android:gravity="start|center_vertical"
         android:text="@string/create_collection_name_collection"
         android:textAppearance="@style/HeaderTextStyle"

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

@@ -19,7 +19,7 @@
         android:drawableStart="@drawable/mozac_ic_back"
         android:drawablePadding="8dp"
         android:gravity="start|center_vertical"
-        android:drawableTint="@color/neutral_text"
+        app:drawableTint="@color/neutral_text"
         android:text="@string/create_collection_select_collection"
         android:textAppearance="@style/HeaderTextStyle"
         android:textColor="@color/neutral_text"

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

@@ -45,7 +45,7 @@
                 android:drawableStart="@drawable/ic_info"
                 android:text="@string/sync_add_new_device_message"
                 android:drawablePadding="8dp"
-                android:drawableTint="@color/sync_error_text_color"
+                app:drawableTint="@color/sync_error_text_color"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:textColor="@color/sync_error_text_color"

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

@@ -78,9 +78,9 @@
         android:layout_marginTop="8dp"
         android:drawableStart="@drawable/ic_folder_icon"
         android:drawablePadding="10dp"
-        app:drawableTint="?primaryText"
         android:textColor="?secondaryText"
         android:textSize="16sp"
+        app:drawableTint="?primaryText"
         tools:text="Mobile Bookmarks" />
 
 </LinearLayout>

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

@@ -4,6 +4,7 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 <LinearLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools" android:id="@+id/no_content_wrapper"
         android:background="@drawable/empty_session_control_background"
         android:layout_marginBottom="12dp"
@@ -16,7 +17,7 @@
             android:id="@+id/no_content_header"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:drawableTint="?primaryText"
+            app:drawableTint="?primaryText"
             android:drawablePadding="8dp"
             tools:text="@tools:sample/lorem"
             tools:drawableEnd="@drawable/ic_tab_collection"