Merge changes I154a6f3a,I79f0c20a,I605ae9af,I647c7305,I95e96e3e, ...

* changes:
  Move fuzzer's CollectAllSharedDependencies into GenerateAndroidBuildActions
  Support AllowMissingDependencies in prebuilt_apex modules
  Support AllowMissingDependencies for apex dependencies
  Add AllowMissingDependencies support for prebuilt_etc module with no src property
  Make OutputFileForModule work for AllowMissingDependencies
  Fix panics when target arch is riscv64