Log visibility change for all fragments.

Bug: 30681771
Test: SettingsUnitTests

Refactor visibility logging from InstrumentedFragment into a mixin. And
apply mixin in remaining fragments.

Change-Id: Ibbb59904336254a3e4bb9e8c7d0b36e5a6bc2622

src/com/android/settings/datausage/AppDataUsage.java

@@ -357,7 +357,7 @@ public class AppDataUsage extends DataUsageBase implements Preference.OnPreferen
     }
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.APP_DATA_USAGE;
     }
 

src/com/android/settings/datausage/BillingCycleSettings.java

@@ -137,7 +137,7 @@ public class BillingCycleSettings extends DataUsageBase implements
     }
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.BILLING_CYCLE;
     }
 

src/com/android/settings/datausage/DataSaverSummary.java

@@ -100,7 +100,7 @@ public class DataSaverSummary extends SettingsPreferenceFragment
     }
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.DATA_SAVER_SUMMARY;
     }
 

src/com/android/settings/datausage/DataUsageList.java

@@ -109,7 +109,7 @@ public class DataUsageList extends DataUsageBase {
     private View mHeader;
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.DATA_USAGE_LIST;
     }
 

src/com/android/settings/datausage/DataUsageMeteredSettings.java

@@ -61,7 +61,7 @@ public class DataUsageMeteredSettings extends SettingsPreferenceFragment impleme
     private Preference mWifiDisabled;
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.NET_DATA_USAGE_METERED;
     }
 

src/com/android/settings/datausage/DataUsageSummary.java

@@ -257,7 +257,7 @@ public class DataUsageSummary extends DataUsageBase implements Indexable, DataUs
     }
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.DATA_USAGE_SUMMARY;
     }
 

src/com/android/settings/datausage/UnrestrictedDataAccess.java

@@ -204,7 +204,7 @@ public class UnrestrictedDataAccess extends SettingsPreferenceFragment
     }
 
     @Override
-    protected int getMetricsCategory() {
+    public int getMetricsCategory() {
         return MetricsEvent.DATA_USAGE_UNRESTRICTED_ACCESS;
     }