Don't log an error if we cannot open icon hash

The icons will end up being processed if we cannot access the hash
so let's just fail gracefully and silently.

Change-Id: I6368ee9bb47a9d52351fff22283ffac2de625b71
Themes: Get resources with an explicit theme attached.

Change-Id: If04e82a13250f520d70b58991586c8ce38f0ecb1