Clean up search fragment loader lifecycle.

- Programatically create SearchView to make it always expand across
  entire action bar.
- Store current query text during screen rotation
- Restart loader when query text changes

Bug: 33354491
Test: RunSettingsRoboTests
Change-Id: I63838a38514569aac60c5d67ac52ac06a7acd5a3

src/com/android/settings/dashboard/DashboardContainerFragment.java

@@ -28,9 +28,9 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import com.android.internal.logging.nano.MetricsProto;
-import com.android.settings.core.InstrumentedFragment;
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
+import com.android.settings.core.InstrumentedFragment;
 import com.android.settings.core.instrumentation.MetricsFeatureProvider;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.overlay.SupportFeatureProvider;
@@ -77,7 +77,7 @@ public final class DashboardContainerFragment extends InstrumentedFragment {
 
         // check if support tab needs to be selected
         final String selectedTab = getArguments().
-            getString(EXTRA_SELECT_SETTINGS_TAB, ARG_SUMMARY_TAB);
+                getString(EXTRA_SELECT_SETTINGS_TAB, ARG_SUMMARY_TAB);
         if (TextUtils.equals(selectedTab, ARG_SUPPORT_TAB)) {
             mViewPager.setCurrentItem(INDEX_SUPPORT_FRAGMENT);
         } else {