Remove toggles in battery settings.

In Android P, we only show "Battery saver" and "Power management"
in battery settings. So we need to remove other preferences.

Keep "Battery percentage" toggle for now because it is not
cross-listed in other places.

Bug: 71502850
Test: Screenshot
Change-Id: Ia3c919f61239ff71f9343f2bce961aa4b89533c0

tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryLegacyTest.java

@@ -400,18 +400,6 @@ public class PowerUsageSummaryLegacyTest {
         assertThat(percent).isWithin(PRECISION).of(POWER_USAGE_PERCENTAGE);
     }
 
-    @Test
-    public void testNonIndexableKeys_MatchPreferenceKeys() {
-        final Context context = RuntimeEnvironment.application;
-        final List<String> niks = PowerUsageSummary.SEARCH_INDEX_DATA_PROVIDER
-                .getNonIndexableKeys(context);
-
-        final List<String> keys = XmlTestUtils.getKeysFromPreferenceXml(context,
-                R.xml.power_usage_summary);
-
-        assertThat(keys).containsAllIn(niks);
-    }
-
     @Test
     public void testPreferenceControllers_getPreferenceKeys_existInPreferenceScreen() {
         final Context context = RuntimeEnvironment.application;