make fallback activity distraction optimized

Fixes: 120419738

Test: on head unit
Change-Id: Ie93a1c172465605e9a99a134aaf489ebf794978d
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6c25f8e..26b7655 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -164,6 +164,7 @@
                 <category android:name="android.intent.category.HOME" />
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
+            <meta-data android:name="distractionOptimized" android:value="true"/>
         </activity>
 
         <service android:name=".bluetooth.BluetoothPairingService" />