Populate java_api_libray's IDEInfo

Adding the srcjar to module_bp_java_deps.json is useful for IDE
autocompletion of rdeps.

Bug: 353806911
Test: cat out/soong/module_bp_java_deps.json | jq '."core.current.stubs.from-text"'
{
  "dependencies": [
    "stub-annotations"
  ],
  "srcjars": [
    "out/soong/.intermediates/build/soong/java/core-libraries/core.current.stubs.from-text/android_common/metalava/core.current.stubs.from-text-stubs.srcjar"
  ],
  "path": [
    "build/soong/java/core-libraries"
  ],
  "libs": [
    "stub-annotations"
  ]
}

Change-Id: Ie4ad985a7da40b478453735dfdb10d0ac63ab8f4

java/java.go

@@ -2386,10 +2386,35 @@ func (al *ApiLibrary) MinSdkVersion(ctx android.EarlyModuleContext) android.ApiL
 	return android.FutureApiLevel
 }
 
+func (al *ApiLibrary) IDEInfo(i *android.IdeInfo) {
+	i.Deps = append(i.Deps, al.ideDeps()...)
+	i.Libs = append(i.Libs, al.properties.Libs...)
+	i.Static_libs = append(i.Static_libs, al.properties.Static_libs...)
+	i.SrcJars = append(i.SrcJars, al.stubsSrcJar.String())
+}
+
+// deps of java_api_library for module_bp_java_deps.json
+func (al *ApiLibrary) ideDeps() []string {
+	ret := []string{}
+	ret = append(ret, al.properties.Libs...)
+	ret = append(ret, al.properties.Static_libs...)
+	if al.properties.System_modules != nil {
+		ret = append(ret, proptools.String(al.properties.System_modules))
+	}
+	if al.properties.Full_api_surface_stub != nil {
+		ret = append(ret, proptools.String(al.properties.Full_api_surface_stub))
+	}
+	// Other non java_library dependencies like java_api_contribution are ignored for now.
+	return ret
+}
+
 // implement the following interfaces for hiddenapi processing
 var _ hiddenAPIModule = (*ApiLibrary)(nil)
 var _ UsesLibraryDependency = (*ApiLibrary)(nil)
 
+// implement the following interface for IDE completion.
+var _ android.IDEInfo = (*ApiLibrary)(nil)
+
 //
 // Java prebuilts
 //