[TouchToFill][Android] Fix credential list bottom padding

Adds clipToPadding="false" to the credential ListView (huge thanks to
fhorschig@ for the tip).

Bug: 1012655
Change-Id: I2a58bb1aee4af3af95cc1bc852f1aa40ff83cd4a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1848376
Auto-Submit: Boris Sazonov <bsazonov@chromium.org>
Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704141}

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

@@ -48,8 +48,10 @@
         android:id="@+id/credential_list"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginTop="16dp"
+        android:clipToPadding="false"
+        android:paddingBottom="16dp"
         android:divider="@null"
         android:dividerHeight="8dp"
-        android:paddingTop="16dp"
         tools:listitem="@layout/touch_to_fill_credential_item"/>
 </LinearLayout>