[automerger skipped] add libmodprobe api to query the number of modules loaded am: 8bafa9e2 am: bea59a77 -s ours am: 5bf6c346 -s ours am: 724ba83f -s ours

am skip reason: Change-Id I15a252b6e9394292c8f3557ed65112c935830441 with SHA-1 b0c4881e is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/11711956

Change-Id: I30be7b85bc73feb3b1e98279e517b960032de661