Add bt battery level to QS icons

Test: visual
Change-Id: I690e496e3e88fd734d43ea2f25396772e922940c
Fixes: 63393322
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BluetoothControllerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BluetoothControllerImpl.java
index 5b24f9c..3b15c2b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BluetoothControllerImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BluetoothControllerImpl.java
@@ -121,6 +121,11 @@
     }
 
     @Override
+    public CachedBluetoothDevice getLastDevice() {
+        return mLastDevice;
+    }
+
+    @Override
     public int getMaxConnectionState(CachedBluetoothDevice device) {
         return getCachedState(device).mMaxConnectionState;
     }