ANDROID: cpufreq: times: track per-uid time in state

Add /proc/uid_time_in_state showing per uid/frequency/cluster
times. Allow uid removal through /proc/uid_cputime/remove_uid_range.

Signed-off-by: Connor O'Brien <connoro@google.com>
Bug: 72339335
Bug: 127641090
Test: Read /proc/uid_time_in_state
Change-Id: I20ba3546a27c25b7e7991e2a86986e158aafa58c