Allow access to trace_data_file from untrusted_app context

Bug: http://b/170257616

This allows native code in CTS tests to write their coverage profiles.
Like other cases of this pattern, this is only enabled with the
NATIVE_COVERAGE build parameter, and shouldn't affect release build
configurations.

Test: atest -a CtsNdkBinderTestCases and verify non-zero coverage in
      cts/tests/tests/binder_ndk/libbinder_ndk_test/
Change-Id: Id78aa67750f33c4a8ec6e7fcf8418ff23fc27ac7
1 file changed