Refactor LocationSettings

- Extends BasePreferenceController in LocationBasePreferenceController
which binds preference key based on xml file instead of writing the key
in java code. Then the controller can be used in many xmls.
- Modify LocationServicePreferenceController to support only personal or
profile user.

Bug: 141601408
Test: manual, robolectric
Change-Id: I51ee950dfb87474df84a8dc3db55fb911edcf599

tests/robotests/src/com/android/settings/location/LocationScanningPreferenceControllerTest.java

@@ -38,7 +38,7 @@ public class LocationScanningPreferenceControllerTest {
     @Before
     public void setUp() {
         mContext = RuntimeEnvironment.application;
-        mController = new LocationScanningPreferenceController(mContext);
+        mController = new LocationScanningPreferenceController(mContext, "key");
     }
 
     @Test