Build a bridge to control whether the graph is clickable or not

Create a bridge to read phenotype flag from GoogleSettings to control
whether each time slot in the graph is clickable or not.

Bug: 185308803
Test: make SettingsRoboTests
Change-Id: If8b58dcaa50ad5fb6b447ca5b7146639ee31a9df

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

@@ -246,12 +246,10 @@ public final class ConvertUtilsTest {
         assertBatteryDiffEntry(entryList.get(0), 75, 40L, 50L);
         // Verifies the last 24 hours aggregate result.
         entryList = purgedResultMap.get(Integer.valueOf(-1));
-        assertThat(entryList).hasSize(2);
+        assertThat(entryList).hasSize(1);
         // Verifies the fake data is cleared out.
         assertThat(entryList.get(0).getPackageName())
             .isNotEqualTo(ConvertUtils.FAKE_PACKAGE_NAME);
-        assertThat(entryList.get(1).getPackageName())
-            .isNotEqualTo(ConvertUtils.FAKE_PACKAGE_NAME);
     }
 
     @Test