Google has been pushing Gingerbread and how it is better than ever for game development. The picture below is from a page culled from the Android 2.3 SDK which displays a bunch of new key codes in the system targeted for gaming: L1, L2, R1, R2, A, B,C, etc.
Is this new picture related to the Sony PlayStation Phone? Possibly... but Sony are most likely working on their own environment for key mapping with PlayStation-branded titles instead of letting the Android SDK take control.
Maybe Google are wanting to take on mobile gaming seriously - hopefully this helps the sequel to Angry Birds ;)