Sort imports

Having consistent import order will reduce chance of merge
conflict between internal and external master

Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b

tests/robotests/src/com/android/settings/backup/BackupInactivePreferenceControllerTest.java

@@ -20,6 +20,8 @@ import static com.google.common.truth.Truth.assertThat;
 
 import android.content.Context;
 
+import androidx.preference.Preference;
+
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
@@ -31,8 +33,6 @@ import org.mockito.MockitoAnnotations;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
-import androidx.preference.Preference;
-
 @RunWith(SettingsRobolectricTestRunner.class)
 @Config(shadows = {ShadowPrivacySettingsUtils.class})
 public class BackupInactivePreferenceControllerTest {