Fix aapt when outputting meta-data tag values
Fix aapt when outputting meta-data tag values

This fixes outputting string as well as not crashing when the
<meta-data> element has an "android:resource" attribute instead
of an "android:value" attribute.

Bug: 11255844
Change-Id: Iadb62b5dcb18ea3db8dbd2ba3241f489606d535d

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base