Move BlockingQueue.h to libinput

This is already useful in several places, and it's going to be also
useful in the future when InputConsumer is refactored.

So let's move it to include/input.

Bug: 311142655
Test: m inputflinger_blocking_queue_fuzzer
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:3782af62ea590e8945f2175a90aa2b6f4995814d)
Merged-In: Idfc492c6bfc3cccab7e0b0d12b21a41a954cc44b

Change-Id: Ie662961b77d331cd62b529bae0fd66e56a69bd19