Android: Blue close indicator text in gesture navigation

Makes the "Close [Chrome]" text blue when it appears on the last page
navigation.

Bug: 979498
Change-Id: I89f63e56b32ac4c6c3e157b5cbcab858081716b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768804Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690919}

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

@@ -29,7 +29,7 @@
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:gravity="center"
-        android:textAppearance="@style/TextAppearance.BlackTitle2"
+        android:textAppearance="@style/TextAppearance.BlueTitle2"
         android:paddingTop="@dimen/navigation_bubble_text_top_padding"
         android:paddingStart="@dimen/navigation_bubble_text_start_padding"
         android:paddingEnd="@dimen/navigation_bubble_text_end_padding"