Track surfaceflinger CPU usage

Use the same approach that is used to track system server thread group
CPU usage: KernelSingleProcessCpuThreadReader which uses the eBPF
time_in_state program to record CPU usage for selected pids and tids.

Test: cmd stats pull-source 10098
Test: atest CpuStatsTests
Bug: 181232205
Change-Id: I84d46409547f92e410fd3b4f8b8ccb823bcee98b