Bug: 179354495
Test: m out/soong/hiddenapi/hiddenapi-stub-flags.txt
- check that an error is reported if a modular stub-flags.csv file,
i.e. one created by a fragment is not a subset of the monolithic
file, e.g. because a signature in the modular file has different
flags than it does in the monolithic or is not present there.
Merged-In: I46ebb495cb093a5e3abe7571c49933c845318549
Change-Id: I46ebb495cb093a5e3abe7571c49933c845318549
(cherry picked from commit 2e88097152)