[automerger skipped] add libmodprobe api to query the number of modules loaded am: 8bafa9e2 am: bea59a77 am: c473ad3e -s ours am: f09481fb -s ours

am skip reason: Change-Id I15a252b6e9394292c8f3557ed65112c935830441 with SHA-1 8bafa9e2 is in history

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

Change-Id: I30030cdf217524f393be8f1c7927503af8db223f