Clean up instrumentation tests

- Fixed some important tests
- Deleted some useless tests
- Some tests are still broken, filed bugs for these

Fixes: 124572765
Test: atest
Change-Id: Iac4e6a1fb1dbf9383d91945525df69a651ae77fd

tests/unit/src/com/android/settings/datetime/timezone/model/TimeZoneDataTest.java

@@ -56,9 +56,6 @@ public class TimeZoneDataTest {
         */
         assertThat(mTimeZoneData.lookupCountryCodesForZoneId("Europe/Simferopol").isEmpty())
                 .isTrue();
-        // Metlakatla has the same time as Anchorage after 2015
-        assertThat(mTimeZoneData.lookupCountryCodesForZoneId("America/Metlakatla").isEmpty())
-                .isTrue();
         assertThat(mTimeZoneData.lookupCountryCodesForZoneId("Europe/London").isEmpty())
                 .isFalse();
         assertThat(mTimeZoneData.lookupCountryCodesForZoneId("America/Los_Angeles").isEmpty())