matrices: automotive.audiocontrol in 7.xml has max version am: 966a4f13

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2688072



Change-Id: Idd95c933262c3defbcc921457be47291f67cd1c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>