Add logging to Bluetooth settings.

- Add logging when users selects the listed devices to connect or
disconnect, and when connection error is shown
- Update the event for the top level bluetooth master switch toggle to
have its own event.

Change-Id: I58f21256fdd07fad9d733ff987ff38df1148f4f8
Fix: 35065258
Test: make RunSettingsRoboTests

src/com/android/settings/bluetooth/BluetoothDevicePreference.java

@@ -34,7 +34,10 @@ import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.ImageView;
 
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
+import com.android.settings.core.instrumentation.MetricsFeatureProvider;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.Index;
 import com.android.settings.search.SearchIndexableRaw;
 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
@@ -205,11 +208,20 @@ public final class BluetoothDevicePreference extends Preference implements
     void onClicked() {
         int bondState = mCachedDevice.getBondState();
 
+        final MetricsFeatureProvider metricsFeatureProvider =
+            FeatureFactory.getFactory(getContext()).getMetricsFeatureProvider();
+
         if (mCachedDevice.isConnected()) {
+            metricsFeatureProvider.action(getContext(),
+                MetricsEvent.ACTION_SETTINGS_BLUETOOTH_DISCONNECT);
             askDisconnect();
         } else if (bondState == BluetoothDevice.BOND_BONDED) {
+            metricsFeatureProvider.action(getContext(),
+                MetricsEvent.ACTION_SETTINGS_BLUETOOTH_CONNECT);
             mCachedDevice.connect(true);
         } else if (bondState == BluetoothDevice.BOND_NONE) {
+            metricsFeatureProvider.action(getContext(),
+                MetricsEvent.ACTION_SETTINGS_BLUETOOTH_PAIR);
             pair();
         }
     }