Implement CarStorageMonitoringManager.getBootIoStats()

This API returns information about I/O activity that the system performed from kernel initalization until
the BOOT_COMPLETE notification was broadcast.

Bug: 65846699
Bug: 32512551
Test: runtest -x p/s/C/tests/carservice[_unit]_test/src/com/android/car/CarStorageMonitoringTest.java
Change-Id: I2eaed1491dc6a5dda8e34edd41047c64dcc2f537
12 files changed