Themes: Fix -110 install error [2/2]

aapt was being called from PM with a ' ' at the end of the cmd. This would
cause installd to read unexpected parts of memory which sometimes
causes it to parse the command incorrectly.

Change-Id: I85bf93045370478fd9baaf5db784c0cc3a4a03b9
CM11 Themes: Expose applyDefaultTheme to public service

Change-Id: I952870fb984d51d554e560566a8cadbe2c49cc6b