Mark composer apex as bootstrap am: e7b42bc5cf

Original change: https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/2976873

Change-Id: Iebcc14f60bca11b69396002496072fc0a3a4a5b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>