onclite: overlay: Don't pin home app

- saves little bit RAM(~13MB).

Test:
Compare the following commands output before and after this patch.
  1) adb shell dumpsys pinner
  2) adb shell cat /proc/meminfo | grep Mlocked

Change-Id: I2ba07bfa8432769eb6ef4dd9265be7bb1487bd12

overlay/frameworks/base/core/res/res/values/config.xml

@@ -324,9 +324,6 @@
         <item>"/apex/com.android.media/javalib/updatable-media.jar"</item>
     </string-array>
 
-    <!-- Should the pinner service pin the Home application? -->
-    <bool name="config_pinnerHomeApp">true</bool>
-
     <!-- Flag indicating whether we should enable smart battery. -->
     <bool name="config_smart_battery_available">true</bool>