Fix sign-in account name and email ellipsized by word

Add android:singleLine to buttons so that the sign-in account name and
email is ellipsized by character.

Bug: 859153
Change-Id: Ie9916b0c640edab4a6ca1418335a6086736775d3
Reviewed-on: https://chromium-review.googlesource.com/1123219
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572029}

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

@@ -29,7 +29,7 @@
         android:layout_marginStart="24dp"
         android:layout_marginTop="6dp"
         android:ellipsize="end"
-        android:maxLines="1"
+        android:singleLine="true"
         android:text="@string/signin_promo_continue_as"/>
 
     <Button
@@ -42,6 +42,6 @@
         android:layout_marginStart="24dp"
         android:layout_marginTop="6dp"
         android:ellipsize="end"
-        android:maxLines="1"
+        android:singleLine="true"
         android:text="@string/signin_promo_choose_account"/>
 </merge>
\ No newline at end of file

chrome/android/java/res/values-v17/styles.xml

@@ -594,6 +594,8 @@
          they are removed from @style/ButtonCompatBase. -->
     <style name="SigninButtonBorderlessRegular">
         <item name="android:background">?android:attr/selectableItemBackground</item>
+        <item name="android:paddingStart">0dp</item>
+        <item name="android:paddingEnd">0dp</item>
         <item name="android:fontFamily">sans-serif</item>
         <item name="android:textAllCaps">false</item>
         <item name="android:textStyle">normal</item>