Fuzz InputDispatcher

Initial version of a fuzzer for InputDispatcher.

The goal is to reproduce crashes that are triggered by the fatal logs,
mainly around:
1) mismatching downtime / eventTimes
2) unexpected hover events

Currently, the fuzzer runs without hitting those targets.
However, it hits an ODR due to rect so currently it has to run without
checking for ODRs.

It also currently hits an out of memory issue after a short run, finding
a problem in
AStatsManager_setPullAtomCallback packages/modules/StatsD/lib/libstatspull/stats_pull_atom_callback.cpp:397:46

Bug: 281806933
Test: FUZZER=inputflinger_input_dispatcher_fuzzer; m $FUZZER && ASAN_OPTIONS=detect_odr_violation=0 $ANDROID_HOST_OUT/fuzz/x86_64/$FUZZER/$FUZZER
Test: atest inputflinger_benchmarks
Change-Id: I465ea11520fc9cc21886646c0ecf20dc529b2698