Add change id ALLOW_TEST_API_ACCESS

We will use this change id in art/runtime/hidden_api.cc to provide a
mechanism for applications to access @TestApi methods

This change id will always be disabled by default and should only be
used by platform test code.

Bug: 166236554
Test: adb shell dumpsys platform_compat
Change-Id: If354a4dcadcf8e0e7a8fd83bac9c95dbaf0dbb2e
1 file changed