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

cc/cc.go

@@ -3330,6 +3330,11 @@ func (c *Module) OutputFiles(tag string) (android.Paths, error) {
 			return android.Paths{c.outputFile.Path()}, nil
 		}
 		return android.Paths{}, nil
+	case "unstripped":
+		if c.linker != nil {
+			return android.PathsIfNonNil(c.linker.unstrippedOutputFilePath()), nil
+		}
+		return nil, nil
 	default:
 		return nil, fmt.Errorf("unsupported module reference tag %q", tag)
 	}