[TouchToFill][Android] Fix TouchToFill title alignment after rotation

Replaces how the title and the subtitle in the TouchToFill bottom sheet
are aligned. Before, layout_width="match_parent" with
textAlignment="center" were used. This has caused issues with device
rotation (see bug). After this change, layout_width="wrap_content" and
layout_gravity="center_horizontal" are used.

Bug: 1012224
Change-Id: I98f7cdeab9be84eee80d2dc14cc29ae820af6b13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1847285Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703769}

chrome/browser/touch_to_fill/android/internal/java/res/layout/touch_to_fill_sheet.xml

@@ -31,17 +31,17 @@
         app:srcCompat="@drawable/touch_to_fill_header_image" />
 
     <org.chromium.ui.widget.TextViewWithLeading
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAlignment="center"
+        android:layout_gravity="center_horizontal"
         android:text="@string/touch_to_fill_sheet_title"
         android:textAppearance="@style/TextAppearance.BlackHeadline" />
 
     <org.chromium.ui.widget.TextViewWithLeading
         android:id="@+id/touch_to_fill_sheet_subtitle"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAlignment="center"
+        android:layout_gravity="center_horizontal"
         android:textAppearance="@style/TextAppearance.BlackHint1" />
 
     <ListView