hiddenapi: Support 'core-platform-api' flag

Add support for parsing @CorePlatformApi stubs and encoding it in
hiddenapi dex flags of the corresponding fields/methods.

(1) The CL refactors hiddenapi::ApiList class to store a second value:
a bit vector of "domain API" flags. These are intended for encoding
membership in a set of API stubs only available to certain callers,
e.g. @CorePlatformApi when platform code calls core platform or
@TestApi for CTS tests.

(2) Parse @CorePlatformApi stubs and set domain flags for its members.

(3) Parse the flags at runtime and set kAccCorePlatformApi access flag
on the corresponding ArtField/ArtMethod objects.

Bug: 119068555
Test: m appcompat
Test: dexlayout -b <core-oj jar> | grep 'CORE-PLATFORM-API'
Change-Id: Idbfa6d3af7459258a5a0b6da7c03c037a577eb75