Enforce hidden api usage in vendor (soong)

From aosp/588578, if vendor app doesn't fill sdk_version, build scirpt overwrites system_current to sdk_version.
But there is no similar enforcement in soong.

So, as make does, sdkVersion() returns "system_current" if it is device-specific or soc-specific module. and sdk_version is not filled.

Test: pass soong test
Bug: 132780927

Change-Id: I69bb3d7bfcf7c27c2db4d0efbe046f9c7879b4bc

1 files changed, 26 insertions, 0 deletions

diff --git a/java/java_test.go b/java/java_test.go
index 22dec073f..628fec3f8 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -282,6 +282,32 @@ func TestSimple(t *testing.T) {
 	}
 }
 
+func TestSdkVersion(t *testing.T) {
+	ctx := testJava(t, `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			vendor: true,
+		}
+
+		java_library {
+			name: "bar",
+			srcs: ["b.java"],
+		}
+	`)
+
+	foo := ctx.ModuleForTests("foo", "android_common").Module().(*Library)
+	bar := ctx.ModuleForTests("bar", "android_common").Module().(*Library)
+
+	if foo.sdkVersion() != "system_current" {
+		t.Errorf("If sdk version of vendor module is empty, it must change to system_current.")
+	}
+
+	if bar.sdkVersion() != "" {
+		t.Errorf("If sdk version of non-vendor module is empty, it keeps empty.")
+	}
+}
+
 func TestArchSpecific(t *testing.T) {
 	ctx := testJava(t, `
 		java_library {