Add button highlighting to saved passwords settings

Problem: Cannot see highlighting of currently selected Saved Password
when navigating Saved Password Settings for the following scenarios:
- with Bluetooth keyboard
- Accessibility (Explore by touch).
- Touch/click event highlighting.

Solution: Change background of affected buttons to
selectableItemBackground. This enables visible highlighting for the
above scenarios. See bug for screenshots.

Note: Also fixed presubmit errors for textAppearance.

R=melandory@chromium.org

Bug: 873239
Change-Id: I0422529308c7898afc6a315a8369082b8db7af99
Reviewed-on: https://chromium-review.googlesource.com/1171115
Commit-Queue: Theresa <twellington@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584776}

chrome/android/java/res/layout/password_entry_editor_copyable_row.xml

@@ -11,16 +11,15 @@
 
     <TextView
         android:id="@+id/password_entry_editor_row_data"
-        android:textColor="@color/default_text_color"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginTop="15dp"
         android:layout_weight="1"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
+        android:textAppearance="@style/TextAppearance.PreferenceMediumText" />
 
     <org.chromium.chrome.browser.widget.TintedImageButton
         android:id="@+id/password_entry_editor_copy"
-        android:background="@null"
+        android:background="?attr/selectableItemBackground"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="end"

chrome/android/java/res/layout/password_entry_editor_interactive.xml

@@ -53,16 +53,15 @@
 
                 <TextView
                     android:id="@+id/password_entry_editor_password"
-                    android:textColor="@color/default_text_color"
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="15dp"
                     android:layout_weight="1"
-                    android:textAppearance="?android:attr/textAppearanceMedium" />
+                    android:textAppearance="@style/TextAppearance.PreferenceMediumText" />
 
                 <org.chromium.chrome.browser.widget.TintedImageButton
                     android:id="@+id/password_entry_editor_view_password"
-                    android:background="@null"
+                    android:background="?attr/selectableItemBackground"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="end"
@@ -75,7 +74,7 @@
 
                 <org.chromium.chrome.browser.widget.TintedImageButton
                     android:id="@+id/password_entry_editor_copy_password"
-                    android:background="@null"
+                    android:background="?attr/selectableItemBackground"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="end"
@@ -88,8 +87,7 @@
 
             <TextView
                 android:id="@+id/passwords_link"
-                android:textAppearance="?android:attr/textAppearanceMedium"
-                android:textColor="@color/default_text_color"
+                android:textAppearance="@style/TextAppearance.PreferenceMediumText"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="15dp"