Use implementation-defined format when HWC writes to output buffer

When GLES isn't writing to the output buffer directly, request an
implementation-defined format with minimal usage flags, leaving the
format choice up to gralloc. On some hardware this allows HWC to do
format conversions during composition that would otherwise need to be
done (with worse power and/or performance) by the consumer.

Bug: 8316155
Change-Id: Iee6ee8404282036f9fd1833067cfe11dbadbf0bf
Add a boardconfig to force HWC composition of virtual displays

When this boardconfig is defined, even when all virtual display
composition is done by GLES, the HWC will be forced to copy from the
GLES framebuffer to the output buffer. On some hardware this allows
HWC to do format conversions that would otherwise have to be done by
the consumer, with worse power and/or performance.

Bug: 8316155
Change-Id: If980ecc589f138cef063eafa757f7f748196713e
Only consume touches up until the frame time

When resampling is disabled, it's currently possible to consume
touches after the current frame time. This breaks some guarantees and
could cause unexpected behaviors.

Change-Id: I99908a2cac2df9f795dd4a07188b4451213cf3e4
Fix handling of undefined TARGET_FORCE_HWC_FOR_VIRTUAL_DISPLAYS

related to b/8316155 - Implement HWComposer 1.3 w/ virtual display support
Change-Id: I2dc8d65a74174aa833cc491264f97f1f2df49307
Native counterpart of new power manager method

Cherrypicked from master.

b/9464621

Change-Id: I54c0ed50a57ac870da91db8589a73a2c792dbd8d
Bug fixes for SensorService

i) Emulate Flush for AOSP Fusion Sesnsors on newer HALs that support batching.
ii) Early return if there are no events for the current SensorEventConnection.

Bug: 11325707, 11376538

Change-Id: Idb856302463649a99d3d5d0c965bb06ba06b8e1d
EGL: rename CallStack::dump into CallStack::log

Bug: 11324229
Change-Id: Ibac1be182c336e7aa5ac098f08d18b3c188964b4
DispSync: remove delay when enabling vsync events

This change fixes a bug that caused an extra frame of latency when enabling
vsync event callbacks in DispSync.  The bug was related to the logic that
prevents the two events from firing with very little time between them due to
updates to the vsync model.

Bug: 11479720
Change-Id: Ie7eaff9e92ffb7b7b6cb4d3d4402c96cbd29af7e
Don't use implementation-defined format with CPU consumers

If the virtual display surface is being consumed by the CPU, it can't
be allowed with HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED since there is
no way for the CPU consumer to find out what format gralloc chose. So
for CPU-consumer surfaces, just use the BufferQueue's default format,
which can be set by the consumer.

A better but more invasive change would be to let the consumer require
a certain format (or set of formats?), and disallow the producer from
requesting a different format.

Bug: 11479817
Change-Id: I5b20ee6ac1146550e8799b806e14661d279670c0
Provide virtual display output buffer to HWC in prepare

We were already making sure the HWComposer class had the handle before
prepare, but it wasn't passing the handle along to HWC as intended.

Partial fix for bug: 11430248
Change-Id: I25f672c4fdfaa6a81fe0acb24d9ad05153ee17dc
Don't change the framebuffer target until we render a new one

Continuing to send the last-rendered framebuffer to HWC on subsequent
frames allows the HWC to read partially-composed regions that haven't
changed, instead of re-composing from scratch.

Bug: 11573910
Change-Id: I8829877d2a06001f1e1b3f168cbba71c7b217b2d
Merge remote-tracking branch 'PA-native/kitkat' into kitkat