Revert "Change incall_secondary_info_background to semi-grey"

This reverts commit 9be4e57089a52feb0c270918c88a48ed93dfa504.
InCallUI: Add transparency to Glowpad background [1/3]

this adds transparency to the glowpad view background so the incoming caller's entire picture can be seen.
PS8:making it a preference.

PS16: Permissions

Change-Id: I33bfdc6ed641770a4e0ceb7841e0908581256757