mondrianwifi: overlay: Remove unused overlay

Change-Id: Idc4869df0db46be96c430bccd8b88f03171588ef
mondrianwifi: And back to QCOM power HAL again

Change-Id: Ie19a88ef9b3f00cd437cc5560630ef6fb5cfd6ad
mondrianwifi: audio: Don't use the speaker for speaker-and-headphones

Prior to this commit, the audio was only being played on the speaker
and not on the headphones.

"Fix" that with a hammer by taking over this use-case and making it
play only over the headphones instead.

Change-Id: I2663ba01769e27bd7ee032a0bc6de3c3d95d4ee6