Dump the required modules into module-info.json

Certain applications, like tracking the dependency chain of modules,
knowing the "required" dependencies is required.

In this context, "required" here means the `required` field in
Android.bp files.

Bug: 339193439
Test: Inspect module-info.json for the `required` field
Change-Id: I420c781d410e715ef86823278f99e4ffe51f8022

android/module.go

@@ -1982,6 +1982,7 @@ func (m *ModuleBase) GenerateBuildActions(blueprintCtx blueprint.ModuleContext)
 			TargetDependencies: targetRequired,
 			HostDependencies:   hostRequired,
 			Data:               data,
+			Required:           m.RequiredModuleNames(),
 		}
 		SetProvider(ctx, ModuleInfoJSONProvider, m.moduleInfoJSON)
 	}