Add a prebuilt module type for usr/share.

This is almost the same as prebuilt_etc except the base path.

Bug: 122616578
Test: prebuilt_etc_test.go + manual test with external/neven
Change-Id: Ie3d17c06a878853ec9df93fe2c61c8772bc5cff4
diff --git a/android/prebuilt_etc_test.go b/android/prebuilt_etc_test.go
index d0961a7..206f53b 100644
--- a/android/prebuilt_etc_test.go
+++ b/android/prebuilt_etc_test.go
@@ -29,6 +29,7 @@
 	ctx := NewTestArchContext()
 	ctx.RegisterModuleType("prebuilt_etc", ModuleFactoryAdaptor(PrebuiltEtcFactory))
 	ctx.RegisterModuleType("prebuilt_etc_host", ModuleFactoryAdaptor(PrebuiltEtcHostFactory))
+	ctx.RegisterModuleType("prebuilt_usr_share", ModuleFactoryAdaptor(PrebuiltUserShareFactory))
 	ctx.PreDepsMutators(func(ctx RegisterMutatorsContext) {
 		ctx.BottomUp("prebuilt_etc", prebuiltEtcMutator).Parallel()
 	})
@@ -193,3 +194,19 @@
 		t.Errorf("host bit is not set for a prebuilt_etc_host module.")
 	}
 }
+
+func TestPrebuiltUserShareInstallDirPath(t *testing.T) {
+	ctx := testPrebuiltEtc(t, `
+		prebuilt_usr_share {
+			name: "foo.conf",
+			src: "foo.conf",
+			sub_dir: "bar",
+		}
+	`)
+
+	p := ctx.ModuleForTests("foo.conf", "android_arm64_armv8-a_core").Module().(*PrebuiltEtc)
+	expected := "target/product/test_device/system/usr/share/bar"
+	if p.installDirPath.RelPathString() != expected {
+		t.Errorf("expected %q, got %q", expected, p.installDirPath.RelPathString())
+	}
+}