Revert "[soong] new field in Android.bp to request APK signing V4"

This reverts commit 17d69e3484d2e74f28721e86a6554c3d0d740a51.

Reason for revert: This new field is not useful without dependencies in aosp

Test: builds
Change-Id: I87bd820cd6dbc5274ce3d28c4578381718aa805d
Merged-In: I70d6f7dc751510311b03e245b2189a76b395a49c
diff --git a/java/app.go b/java/app.go
index 2fd397a..d535c5a 100755
--- a/java/app.go
+++ b/java/app.go
@@ -580,28 +580,14 @@
 
 	// Build a final signed app package.
 	packageFile := android.PathForModuleOut(ctx, a.installApkName+".apk")
-	v4SigningRequested := Bool(a.Module.deviceProperties.V4_signature)
-	var v4SignatureFile android.WritablePath = nil
-	if v4SigningRequested {
-		v4SignatureFile = android.PathForModuleOut(ctx, a.installApkName+".apk.idsig")
-	}
-	CreateAndSignAppPackage(ctx, packageFile, a.exportPackage, jniJarFile, dexJarFile, certificates, apkDeps, v4SignatureFile)
+	CreateAndSignAppPackage(ctx, packageFile, a.exportPackage, jniJarFile, dexJarFile, certificates, apkDeps)
 	a.outputFile = packageFile
-	if v4SigningRequested {
-		a.extraOutputFiles = append(a.extraOutputFiles, v4SignatureFile)
-	}
 
 	for _, split := range a.aapt.splits {
 		// Sign the split APKs
 		packageFile := android.PathForModuleOut(ctx, a.installApkName+"_"+split.suffix+".apk")
-		if v4SigningRequested {
-			v4SignatureFile = android.PathForModuleOut(ctx, a.installApkName+"_"+split.suffix+".apk.idsig")
-		}
-		CreateAndSignAppPackage(ctx, packageFile, split.path, nil, nil, certificates, apkDeps, v4SignatureFile)
+		CreateAndSignAppPackage(ctx, packageFile, split.path, nil, nil, certificates, apkDeps)
 		a.extraOutputFiles = append(a.extraOutputFiles, packageFile)
-		if v4SigningRequested {
-			a.extraOutputFiles = append(a.extraOutputFiles, v4SignatureFile)
-		}
 	}
 
 	// Build an app bundle.
@@ -1250,7 +1236,7 @@
 		}
 		a.certificate = certificates[0]
 		signed := android.PathForModuleOut(ctx, "signed", apkFilename)
-		SignAppPackage(ctx, signed, dexOutput, certificates, nil)
+		SignAppPackage(ctx, signed, dexOutput, certificates)
 		a.outputFile = signed
 	} else {
 		alignedApk := android.PathForModuleOut(ctx, "zip-aligned", apkFilename)
@@ -1506,7 +1492,7 @@
 	_, certificates := collectAppDeps(ctx, false, false)
 	certificates = processMainCert(r.ModuleBase, String(r.properties.Certificate), certificates, ctx)
 	signed := android.PathForModuleOut(ctx, "signed", r.Name()+".apk")
-	SignAppPackage(ctx, signed, r.aapt.exportPackage, certificates, nil)
+	SignAppPackage(ctx, signed, r.aapt.exportPackage, certificates)
 	r.certificate = certificates[0]
 
 	r.outputFile = signed
diff --git a/java/app_builder.go b/java/app_builder.go
index b2780bc..5e7fbe6 100644
--- a/java/app_builder.go
+++ b/java/app_builder.go
@@ -45,7 +45,7 @@
 	})
 
 func CreateAndSignAppPackage(ctx android.ModuleContext, outputFile android.WritablePath,
-	packageFile, jniJarFile, dexJarFile android.Path, certificates []Certificate, deps android.Paths, v4SignatureFile android.WritablePath) {
+	packageFile, jniJarFile, dexJarFile android.Path, certificates []Certificate, deps android.Paths) {
 
 	unsignedApkName := strings.TrimSuffix(outputFile.Base(), ".apk") + "-unsigned.apk"
 	unsignedApk := android.PathForModuleOut(ctx, unsignedApkName)
@@ -66,10 +66,10 @@
 		Implicits: deps,
 	})
 
-	SignAppPackage(ctx, outputFile, unsignedApk, certificates, v4SignatureFile)
+	SignAppPackage(ctx, outputFile, unsignedApk, certificates)
 }
 
-func SignAppPackage(ctx android.ModuleContext, signedApk android.WritablePath, unsignedApk android.Path, certificates []Certificate, v4SignatureFile android.WritablePath) {
+func SignAppPackage(ctx android.ModuleContext, signedApk android.WritablePath, unsignedApk android.Path, certificates []Certificate) {
 
 	var certificateArgs []string
 	var deps android.Paths
@@ -78,22 +78,14 @@
 		deps = append(deps, c.Pem, c.Key)
 	}
 
-	outputFiles := android.WritablePaths{signedApk}
-	var flag string = ""
-	if v4SignatureFile != nil {
-		outputFiles = append(outputFiles, v4SignatureFile)
-		flag = "--enable-v4"
-	}
-
 	ctx.Build(pctx, android.BuildParams{
 		Rule:        Signapk,
 		Description: "signapk",
-		Outputs:     outputFiles,
+		Output:      signedApk,
 		Input:       unsignedApk,
 		Implicits:   deps,
 		Args: map[string]string{
 			"certificates": strings.Join(certificateArgs, " "),
-			"flags":        flag,
 		},
 	})
 }
diff --git a/java/app_test.go b/java/app_test.go
index 3360510..998c76a 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -1200,66 +1200,6 @@
 	}
 }
 
-func TestRequestV4SigningFlag(t *testing.T) {
-	testCases := []struct {
-		name     string
-		bp       string
-		expected string
-	}{
-		{
-			name: "default",
-			bp: `
-				android_app {
-					name: "foo",
-					srcs: ["a.java"],
-					sdk_version: "current",
-				}
-			`,
-			expected: "",
-		},
-		{
-			name: "default",
-			bp: `
-				android_app {
-					name: "foo",
-					srcs: ["a.java"],
-					sdk_version: "current",
-					v4_signature: false,
-				}
-			`,
-			expected: "",
-		},
-		{
-			name: "module certificate property",
-			bp: `
-				android_app {
-					name: "foo",
-					srcs: ["a.java"],
-					sdk_version: "current",
-					v4_signature: true,
-				}
-			`,
-			expected: "--enable-v4",
-		},
-	}
-
-	for _, test := range testCases {
-		t.Run(test.name, func(t *testing.T) {
-			config := testAppConfig(nil, test.bp, nil)
-			ctx := testContext()
-
-			run(t, ctx, config)
-			foo := ctx.ModuleForTests("foo", "android_common")
-
-			signapk := foo.Output("foo.apk")
-			signFlags := signapk.Args["flags"]
-			if test.expected != signFlags {
-				t.Errorf("Incorrect signing flags, expected: %q, got: %q", test.expected, signFlags)
-			}
-		})
-	}
-}
-
 func TestPackageNameOverride(t *testing.T) {
 	testCases := []struct {
 		name                string
diff --git a/java/java.go b/java/java.go
index f6fe76e..7f3ba98 100644
--- a/java/java.go
+++ b/java/java.go
@@ -337,10 +337,6 @@
 
 	UncompressDex bool `blueprint:"mutated"`
 	IsSDKLibrary  bool `blueprint:"mutated"`
-
-	// If true, generate the signature file of APK Signing Scheme V4, along side the signed APK file.
-	// Defaults to false.
-	V4_signature *bool
 }
 
 func (me *CompilerDeviceProperties) EffectiveOptimizeEnabled() bool {