OnDeviceRefresh::GetSystemServerImagePath support system_ext partition

The /system_ext partition is assumed to be the OEM-specific extension
to the /system partition.
OEM installed SYSTEMSERVERJAR on the system_ext partition does not
require additional execution of dex2oat

Bug: 245383870
Test: atest art_standalone_odrefresh_tests

Change-Id: Ib7b74ef50d50a5203adc8f14efcecf0e7920139a
Signed-off-by: huyuxin <huyuxin@xiaomi.com>
3 files changed