Add shutdown performance test
This CL introduces a new performance test, ShutdownPerfTest, to measure
the shutdown time of the device. The test requires pstore (persistent
storage) on the device to capture kernel logs during shutdown.
The test reboots the device multiple times, extracts the shutdown time
from the kernel log (using pstore), and reports the 95th percentile
shutdown time metric.
Bug: 409182226
Test: atest ShutdownPerfTest
Change-Id: If3b341a5eefa925dc5d7c763f95b174da06f508f
3 files changed
