Downgrade AOSP r52 -> r27
The AP2A (QPR2) release is causing us too much issues: new lunch targets, different CTS/VTS behaviour, 4k playback regression, ...
Since we will switch back to an earlier AOSP baseline, we no longer need this change
This reverts commit e6f2701b.
Signed-off-by: Mattijs Korpershoek mkorpershoek@baylibre.com