Themes: Make sure composed icon info is meaningful

We don't want to try and create a composed icon if the parts that
make up a composed icon are not valid or set.

Conflicts:
	core/java/android/content/res/Resources.java

Change-Id: I699a98e548e848e05d58e31985dcd2c836470fe7
Merge "Themes: Make sure composed icon info is meaningful" into kitkat3