Check AIDL vintf interface extensions for frozen hash

If a frozen vintf interface has an extension that also has vintf
stability, it must also be frozen.

Test: unfreeze av-audio-types-aidl, mark it vintf, attach it
Test: atest vts_vintf_treble_framework_test

Bug: 338410350
Change-Id: Ie314859d2625f943447531b919a5aaabe9fec369
1 file changed