Merge "Reformat and optimize codes in FastPairSimulator." into tm-dev am: d9086a7242 am: cbc81fa906

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Nearby/+/17045423

Change-Id: Ia792476032b4b6bc7bee498e0f1b3ceaa6171209