Adds stats for:
- Number of raw user events that have happened in the system.
- Number of times user activity has been reported, dividied by UID and type of activity.
- Duration of screen brightness levels in 4 buckets.
- Per-UID tracking of who has turned on Wifi and how long we can attribute it being on because of them.
BUG=1743326
Automated import of CL 143748
take place.
This has the same underlying cause as bug #1739874, so this fixes that
bug as well. The problem was that if the supplicant was in the DORMANT
state at the time a scan-only Wi-Fi lock was released, the command to
stop the Wi-Fi driver would never be issued. This had two main results:
first, the driver would stay awake when the screen was blank and it was
supposed to be sleeping, leading to excessive battery drain, and second,
when the screen was turned back on, there would be no DRIVER-STARTED
event generated (because the driver was already running). The
DRIVER-STARTED event is the trigger for the framework to issue a
RECONNECT command to the supplicant to cause it leave the DORMANT state
and look for available remembered networks.
To assist in tracking down this problem, and any such problems in the
future, I added four counters to keep track of how many times full and
scan-only Wi-Fi locks are acquired and released. The counter values
are output in the dump() method of WifiService. While doing this, I
noticed that because of missing "break" statements, the battery stats
that keep track of how much time Wi-Fi locks are held were including
the time for full locks in the time reported for scan-only locks.
BUG=1731826,1739874
Automated import of CL 143124
