Currently, there is a hetero runtime property that darwinn
and other hetero runtime project will use: the trace level
(vendor.google.silicon.max_trace_level).
This change allows edgetpu services and clients to be able to see
that property in order to change the trace level.
Bug: 272292650
Test: verified it to build but not tested on device yet since selinux
has not been enforced yet.
Change-Id: Id6d345b92d2e710b41ca58907ad443fc2667054a
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