Extend SearchView width

To align SearchView x button with right border.

Bug: 254403811
Test: manual,
      Settings > Apps > See all apps > tap the search icon >
      input something and observe.
Change-Id: I5146c9ffb3c5177926e75f673497408092f6c065

src/com/android/settings/datetime/timezone/BaseTimeZonePicker.java

@@ -136,6 +136,7 @@ public abstract class BaseTimeZonePicker extends InstrumentedFragment
 
             mSearchView.setQueryHint(getText(mSearchHintResId));
             mSearchView.setOnQueryTextListener(this);
+            mSearchView.setMaxWidth(Integer.MAX_VALUE);
 
             if (mDefaultExpandSearch) {
                 searchMenuItem.expandActionView();