skin engine: Fix some user-created touch regions being suppressed
Fix the heuristic used for detecting a touch-enabled theme.
The old method assumes that volume bar and progress bar tags
are always auto-created, but this might not be true. Instead,
mark regions that originate from a %T tag as user-created and
check for those.
Change-Id: Iec732d299a2b4e298bef8069a68ff94e3b642703