Fixing problem trying to use channel-position mask for AudioBox 44VSL.

We had moved to channel position masks in the recorder to patch around
a problem. However, there are no legitimate channel position masks
for this 4-channel interface. Converted back to channel-index masks.

Bug: 112578495
Test: Run CTS Verifier with AudioBox 44VSL, note correct behavior.
Run w/ AudioBox 22VSL, note correct behavior (no regression)

Change-Id: I88207acd02f83309c886117a0c12bd2f0ee8ef42
2 files changed