Move fuzzer's CollectAllSharedDependencies into GenerateAndroidBuildActions

Make rust and cc fuzzers collect their shared libraries once in
GenerateAndroidBuildActions and store it for later use by the
packaging singleton.  Also use android.OutputFileForModule to get
the paths.  Together this will fix fuzzers that depend on architecture
specific prebuilt shared libraries that are missing a prebuilt for an
architecture when building with AllowMissingDependencies.

Bug: 250918230
Test: lunch aosp_riscv64-userdebug && m ALLOW_MISSING_DEPENDENCIES=true nothing
Change-Id: I154a6f3a767c883e9fe7067003615db73ee78e2d