Convert location settings to DashboardFragment.

- change LocationMode, LocationSettings, and ScanningSettings to be
DashboardFragment.
- remove LocationSettingsBase and moved base logics into base
controller.
- add controllers for the preferences under the 3 location settings
pages.

Fixes: 68719207
Test: make RunSettingsRoboTests
Change-Id: Icedf691c2a9f7989faebee39ea9da672209b7957

src/com/android/settings/search/SearchIndexableResources.java

@@ -60,6 +60,7 @@ import com.android.settings.inputmethod.AvailableVirtualKeyboardFragment;
 import com.android.settings.inputmethod.PhysicalKeyboardFragment;
 import com.android.settings.inputmethod.VirtualKeyboardFragment;
 import com.android.settings.language.LanguageAndInputSettings;
+import com.android.settings.location.LocationMode;
 import com.android.settings.location.LocationSettings;
 import com.android.settings.location.ScanningSettings;
 import com.android.settings.network.NetworkDashboardFragment;
@@ -129,6 +130,7 @@ public final class SearchIndexableResources {
         addIndex(GestureSettings.class);
         addIndex(LanguageAndInputSettings.class);
         addIndex(LocationSettings.class);
+        addIndex(LocationMode.class);
         addIndex(ScanningSettings.class);
         addIndex(SecuritySettings.class);
         addIndex(ScreenLockSettings.class);