Link type checking for java_library

Link type checking for java_library has not been working unintentionally.
So turn on link type checking for these types.

And also add tests for link type checking.

Bug: 145799020
Test: cherry-pick aosp/1182522 and check if build fails
Test: m nothing and there is no error(soong unittest)

Change-Id: Ifc347f657885de1028ac0076ddd103c0387b597a

java/app_test.go

@@ -175,6 +175,95 @@ func TestPlatformAPIs(t *testing.T) {
 	`)
 }
 
+func TestAndroidAppLinkType(t *testing.T) {
+	testJava(t, `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			static_libs: ["baz"],
+			platform_apis: true,
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		android_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJavaError(t, "Adjust sdk_version: property of the source or target module so that target module is built with the same or smaller API set than the source.", `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		android_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJava(t, `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "system_current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		android_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJavaError(t, "Adjust sdk_version: property of the source or target module so that target module is built with the same or smaller API set than the source.", `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "system_current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		android_library {
+			name: "baz",
+			srcs: ["c.java"],
+		}
+	`)
+}
+
 func TestResourceDirs(t *testing.T) {
 	testCases := []struct {
 		name      string

java/java.go

@@ -792,8 +792,7 @@ func (j *Module) collectDeps(ctx android.ModuleContext) deps {
 			return
 		}
 		switch module.(type) {
-		case *Library:
-		case *AndroidLibrary:
+		case *Library, *AndroidLibrary:
 			if to, ok := module.(linkTypeContext); ok {
 				switch tag {
 				case bootClasspathTag, libTag, staticLibTag:

java/java_test.go

@@ -288,6 +288,94 @@ func moduleToPath(name string) string {
 	}
 }
 
+func TestJavaLinkType(t *testing.T) {
+	testJava(t, `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		java_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJavaError(t, "Adjust sdk_version: property of the source or target module so that target module is built with the same or smaller API set than the source.", `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		java_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJava(t, `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "system_current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		java_library {
+			name: "baz",
+			sdk_version: "system_current",
+			srcs: ["c.java"],
+		}
+	`)
+
+	testJavaError(t, "Adjust sdk_version: property of the source or target module so that target module is built with the same or smaller API set than the source.", `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			libs: ["bar"],
+			sdk_version: "system_current",
+			static_libs: ["baz"],
+		}
+
+		java_library {
+			name: "bar",
+			sdk_version: "current",
+			srcs: ["b.java"],
+		}
+
+		java_library {
+			name: "baz",
+			srcs: ["c.java"],
+		}
+	`)
+}
+
 func TestSimple(t *testing.T) {
 	ctx, _ := testJava(t, `
 		java_library {