CM11 Themes: Pipe stderr from aapt to logcat.

This will allow users to see why aapt failed when installing a
theme.

Change-Id: I74314daae9e844dce2f4c3eeb6c78a40b5ad6357
CM11 Themes: Common overlay for sharing resources. [2/2]

Change-Id: Ied21ede2f36ba16dd190bc1e6cec44fd8560ca90