Merge "Gen a header library when genrules export includes" into main am:...

Merge "Gen a header library when genrules export includes" into main am: dc3606a8 am: 7d00fc56 am: c5c983c9

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2662519



Change-Id: I96df0c7cd3b2d173b261edbb5bcf896577b5845e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>