Lineage properties support module references.

They should have had `android:"path"` tags attached so that users can
point them to filegroup modules.

Test: app_test.go & app_import_test.go
Bug: 182175153
Change-Id: I5580408488ffe5fc12c869cbfb7a468713dcbc96

java/app.go

@@ -122,8 +122,8 @@ type overridableAppProperties struct {
 	// or an android_app_certificate module name in the form ":module".
 	Certificate *string
 
-	// Name of the signing certificate lineage file.
-	Lineage *string
+	// Name of the signing certificate lineage file or filegroup module.
+	Lineage *string `android:"path"`
 
 	// the package name of this app. The package name in the manifest file is used if one was not given.
 	Package_name *string

java/app_import.go

@@ -74,8 +74,8 @@ type AndroidAppImportProperties struct {
 	// be set for presigned modules.
 	Presigned *bool
 
-	// Name of the signing certificate lineage file.
-	Lineage *string
+	// Name of the signing certificate lineage file or filegroup module.
+	Lineage *string `android:"path"`
 
 	// Sign with the default system dev certificate. Must be used judiciously. Most imported apps
 	// need to either specify a specific certificate or be presigned.

java/app_import_test.go

@@ -138,6 +138,32 @@ func TestAndroidAppImport_SigningLineage(t *testing.T) {
 	}
 }
 
+func TestAndroidAppImport_SigningLineageFilegroup(t *testing.T) {
+	ctx, _ := testJava(t, `
+	  android_app_import {
+			name: "foo",
+			apk: "prebuilts/apk/app.apk",
+			certificate: "platform",
+			lineage: ":lineage_bin",
+		}
+
+		filegroup {
+			name: "lineage_bin",
+			srcs: ["lineage.bin"],
+		}
+	`)
+
+	variant := ctx.ModuleForTests("foo", "android_common")
+
+	signedApk := variant.Output("signed/foo.apk")
+	// Check cert signing lineage flag.
+	signingFlag := signedApk.Args["flags"]
+	expected := "--lineage lineage.bin"
+	if expected != signingFlag {
+		t.Errorf("Incorrect signing flags, expected: %q, got: %q", expected, signingFlag)
+	}
+}
+
 func TestAndroidAppImport_DefaultDevCert(t *testing.T) {
 	ctx, _ := testJava(t, `
 		android_app_import {

java/app_test.go

@@ -1576,6 +1576,31 @@ func TestCertificates(t *testing.T) {
 			expectedLineage:     "--lineage lineage.bin",
 			expectedCertificate: "cert/new_cert.x509.pem cert/new_cert.pk8",
 		},
+		{
+			name: "lineage from filegroup",
+			bp: `
+				android_app {
+					name: "foo",
+					srcs: ["a.java"],
+					certificate: ":new_certificate",
+					lineage: ":lineage_bin",
+					sdk_version: "current",
+				}
+
+				android_app_certificate {
+					name: "new_certificate",
+					certificate: "cert/new_cert",
+				}
+
+				filegroup {
+					name: "lineage_bin",
+					srcs: ["lineage.bin"],
+				}
+			`,
+			certificateOverride: "",
+			expectedLineage:     "--lineage lineage.bin",
+			expectedCertificate: "cert/new_cert.x509.pem cert/new_cert.pk8",
+		},
 	}
 
 	for _, test := range testCases {