Collect modules' info to create IDE project file.

- Register a singleton and implement GenerateBuildActions func in java/jdeps.go.
- Declare a interface and a struct to collect info in android/module.go.
- Implement IDEInfo for Library & Import module in java/jdeps.go.
- Implement IDEInfo for Genrule module in genrule/genrule.go.
- Implement IDEInfo for fileGroup module in android/filegroup.go.
- Test codes for jdeps.go in java/jdeps_test.go.

Bug: 111044346

Test: export SOONG_COLLECT_JAVA_DEPS=1;mmm packages/apps/Settings
      out/soong/module_bp_java_deps.json will be generated

Change-Id: If61da77b4d7614c2c5da438b6af4c725ceccc5c3

genrule/genrule.go

@@ -344,6 +344,17 @@ func (g *Module) generateSourceFile(ctx android.ModuleContext, task generateTask
 	g.outputDeps = append(g.outputDeps, task.out[0])
 }
 
+// Collect information for opening IDE project files in java/jdeps.go.
+func (g *Module) IDEInfo(dpInfo *android.IdeInfo) {
+	dpInfo.Srcs = append(dpInfo.Srcs, g.Srcs().Strings()...)
+	for _, src := range g.properties.Srcs {
+		if strings.HasPrefix(src, ":") {
+			src = strings.Trim(src, ":")
+			dpInfo.Deps = append(dpInfo.Deps, src)
+		}
+	}
+}
+
 func generatorFactory(taskGenerator taskFunc, props ...interface{}) *Module {
 	module := &Module{
 		taskGenerator: taskGenerator,