Always check whether given channel config is supported.

Bug: 112660981
Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc
Change-Id: I169161dd31bc624f2cab6be2b4c6518946ed32ba
Merged-In: I169161dd31bc624f2cab6be2b4c6518946ed32ba
(cherry picked from commit 25b209f229879a155759d791fe463b8abd283677)
1 file changed