Merge changes I505a7ad8,I92d88199 into main

* changes:
  Disable source apex variant using apex_available_name
  Skip `contents` validation of source bootclasspath fragments

apex/apex.go

@@ -1078,6 +1078,7 @@ func (a *apexBundle) ApexInfoMutator(mctx android.TopDownMutatorContext) {
 		ApexContents:      []*android.ApexContents{apexContents},
 		TestApexes:        testApexes,
 		BaseApexName:      mctx.ModuleName(),
+		ApexAvailableName: proptools.String(a.properties.Apex_available_name),
 	}
 	mctx.WalkDeps(func(child, parent android.Module) bool {
 		if !continueApexDepsWalk(child, parent) {