Reland "Change payload type to int32_t for fmq device tests" am: 4a2568d1d6 am: 45a34a91b8 am: 643e57744f am: b0560eb932 am: 2a186fde17

Original change: https://android-review.googlesource.com/c/platform/system/libfmq/+/1434351

Change-Id: I4d587d94b895ce0e62d23737e29d27286a19e1a7
tree: 9a258cc37a83999b346bb92399ee29379fd9d1d5
  1. base/
  2. benchmarks/
  3. include/
  4. tests/
  5. Android.bp
  6. EventFlag.cpp
  7. FmqInternal.cpp
  8. OWNERS
  9. PREUPLOAD.cfg
  10. TEST_MAPPING