surfaceflinger: Track the last surfaceview frame for latency dumps

When measuring GL latency with dumpsys, it's possible to hit a
race condition if the hardware is fast enough to complete rendering
the test cycle before the latency dump is requested, since it only
matches the latency for live layers (unless it's an animation. See
change I8bded1ea08a4cddefef0aa955401052bb9107c90)

So always save a reference to the last rendered SurfaceView frame,
and dump its values if there isn't an active one.

Change-Id: I740e9830161396ea955b5a53322bd8576b5136bc
Move idmap to frameworks/base [1/2]

idmap depends on libandroidfw, so it should go in frameworks/base.
This follows AOSP which moved idmap to frameworks/base back in
February of 2014.

Change-Id: If86df906bddf987fd58e31f947ae78ddd0d2c666
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0