Fix GATT autoConnect race condition

As pointed out here:
https://code.google.com/p/android/issues/detail?id=69834

registerApp() causes onClientRegistered() to happen before autoConnect
is set. This patch fixes that.

Bug: 28861330
Change-Id: Ie1174c0f224f5084178439420b383164d22d542c

core/java/android/bluetooth/BluetoothGatt.java

@@ -645,6 +645,9 @@ public final class BluetoothGatt implements BluetoothProfile {
             }
             mConnState = CONN_STATE_CONNECTING;
         }
+
+        mAutoConnect = autoConnect;
+
         if (!registerApp(callback)) {
             synchronized(mStateLock) {
                 mConnState = CONN_STATE_IDLE;
@@ -653,8 +656,7 @@ public final class BluetoothGatt implements BluetoothProfile {
             return false;
         }
 
-        // the connection will continue after successful callback registration
-        mAutoConnect = autoConnect;
+        // The connection will continue in the onClientRegistered callback
         return true;
     }