Implement #8323587, #8323342, #8323590: new features.

8323587: Add feature for supporting app widgets
8323342: Add feature for replacing the home screen
8323590: Add feature for supporting input methods

The app widget service looks for the app widget feature
and refuses to work if it doesn't exist.  I didn't do
this for the input method service because some devices
will probably want to still make use of that mechanism
without supporting third party input methods.

Change-Id: Ia358ccc6059d43f163d74810c7cbe9568a67ede9
diff --git a/data/etc/handheld_core_hardware.xml b/data/etc/handheld_core_hardware.xml
index 9d2a0cb..290afc2 100644
--- a/data/etc/handheld_core_hardware.xml
+++ b/data/etc/handheld_core_hardware.xml
@@ -33,6 +33,9 @@
     <feature name="android.hardware.microphone" />
     <feature name="android.hardware.screen.portrait" />
     <feature name="android.hardware.screen.landscape" />
+    <feature name="android.software.app_widgets" />
+    <feature name="android.software.home_screen" />
+    <feature name="android.software.input_methods" />
     <!-- devices with GPS must include android.hardware.location.gps.xml -->
     <!-- devices with an autofocus camera and/or flash must include either
          android.hardware.camera.autofocus.xml or