Background:
Darwinn Runtime team wants to use a cloud-based infra (Android Core Experiments) to push flags from server to device. The flags will be stored into android properties under the namespace: `persist.device_config.edgetpu_native`, which has a property context called `device_config_edgetpu_native_prop` as added by the other CL: https://android-review.git.corp.google.com/c/platform/system/sepolicy/+/2434232
Change:
Allow EdgeTpu service to read device_config_edgetpu_native_prop
Test: Verified EdgeTpu has access to read the property
Bug: 243553703
Bug: 246401730
Change-Id: I19dca0e2d3008e36bdbca50f610810148a7e11dd
because we need it for DarwinnDelegate to forcelly disable the cache coherency feature for debugging purpose. This sys prop should be readable by all Darwinn Delegate clients, but only modifiable by `adb root`.
Test: Verified that both camera app and camera HAL can read the flag. See pending CL cl/507001854 and android_flag_permission_test.md
Bug: 262420821
Change-Id: I0ae7e02f1d4805956a05afeb92f892cbac6d5213
Previously supported in some cases. Now extend it to all common cases
Bug: 263394888
Test: Built and ran DBA Hal on Android Device
Change-Id: I9a5c6a6c8d8b6c23a7d86678ecae57a9f0bcdf7a
