Streamline AndroidMk generation

Add AndroidMkEmitAssignList to emit a line to assign the items from
the given list of string arrays.

Test: treehugger
Change-Id: Id5acbef38ea4e91349bd2461f226db352d4b8123
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 876a052..1f2be35 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -2997,7 +2997,7 @@
 	var builder strings.Builder
 	data.Custom(&builder, name, prefix, "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += libc.vendor libm.vendor libdl.vendor\n")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := libc++.vendor.myapex:64 mylib.vendor.myapex:64 apex_manifest.pb.myapex apex_pubkey.myapex libc.vendor libm.vendor libdl.vendor\n")
 }
 
 func TestAndroidMkWritesCommonProperties(t *testing.T) {
@@ -5699,7 +5699,7 @@
 	var builder strings.Builder
 	mk.Custom(&builder, ab.Name(), "TARGET_", "", mk)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += myapex.flattened")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := apex_manifest.pb.myapex apex_pubkey.myapex myapex.flattened\n")
 }
 
 func TestErrorsIfDepsAreNotEnabled(t *testing.T) {
@@ -7053,9 +7053,9 @@
 	var builder strings.Builder
 	data.Custom(&builder, name, prefix, "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += a b\n")
-	ensureContains(t, androidMk, "LOCAL_HOST_REQUIRED_MODULES += c d\n")
-	ensureContains(t, androidMk, "LOCAL_TARGET_REQUIRED_MODULES += e f\n")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := mylib.myapex:64 apex_manifest.pb.myapex apex_pubkey.myapex a b\n")
+	ensureContains(t, androidMk, "LOCAL_HOST_REQUIRED_MODULES := c d\n")
+	ensureContains(t, androidMk, "LOCAL_TARGET_REQUIRED_MODULES := e f\n")
 }
 
 func TestSymlinksFromApexToSystem(t *testing.T) {
@@ -7237,7 +7237,7 @@
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := prebuilt_myotherlib.myapex\n")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := myotherlib.myapex\n")
 	// `myapex` should have `myotherlib` in its required line, not `prebuilt_myotherlib`
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += mylib.myapex:64 myotherlib:64 apex_manifest.pb.myapex apex_pubkey.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := mylib.myapex:64 myotherlib:64 apex_manifest.pb.myapex apex_pubkey.myapex\n")
 }
 
 func TestApexWithJniLibs(t *testing.T) {
@@ -8750,7 +8750,7 @@
 
 	// The make level dependency needs to be on otherlib - prebuilt_otherlib isn't
 	// a thing there.
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += otherlib\n")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := libc++:64 mylib.myapex:64 apex_manifest.pb.myapex apex_pubkey.myapex otherlib\n")
 }
 
 func TestExcludeDependency(t *testing.T) {
@@ -9144,7 +9144,7 @@
 	var builder strings.Builder
 	data.Custom(&builder, apexBundle.BaseModuleName(), "TARGET_", "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += foo-dexpreopt-arm64-apex@myapex@javalib@foo.jar@classes.odex foo-dexpreopt-arm64-apex@myapex@javalib@foo.jar@classes.vdex")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := foo.myapex apex_manifest.pb.myapex apex_pubkey.myapex foo-dexpreopt-arm64-apex@myapex@javalib@foo.jar@classes.odex foo-dexpreopt-arm64-apex@myapex@javalib@foo.jar@classes.vdex\n")
 }
 
 func TestAndroidMk_DexpreoptBuiltInstalledForApex_Prebuilt(t *testing.T) {
@@ -9220,7 +9220,7 @@
 	var builder strings.Builder
 	data.Custom(&builder, apexBundle.BaseModuleName(), "TARGET_", "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += otherapex")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := foo.myapex apex_manifest.pb.myapex apex_pubkey.myapex otherapex")
 }
 
 func TestAndroidMk_RequiredDeps(t *testing.T) {
@@ -9244,7 +9244,7 @@
 	var builder strings.Builder
 	data.Custom(&builder, bundle.BaseModuleName(), "TARGET_", "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES += foo")
+	ensureContains(t, androidMk, "LOCAL_REQUIRED_MODULES := apex_manifest.pb.myapex apex_pubkey.myapex foo\n")
 
 	flattenedBundle := ctx.ModuleForTests("myapex", "android_common_myapex_flattened").Module().(*apexBundle)
 	flattenedBundle.requiredDeps = append(flattenedBundle.requiredDeps, "foo")
@@ -9252,7 +9252,7 @@
 	var flattenedBuilder strings.Builder
 	flattenedData.Custom(&flattenedBuilder, flattenedBundle.BaseModuleName(), "TARGET_", "", flattenedData)
 	flattenedAndroidMk := flattenedBuilder.String()
-	ensureContains(t, flattenedAndroidMk, "LOCAL_REQUIRED_MODULES += foo")
+	ensureContains(t, flattenedAndroidMk, "LOCAL_REQUIRED_MODULES := apex_manifest.pb.myapex.flattened apex_pubkey.myapex.flattened foo\n")
 }
 
 func TestApexOutputFileProducer(t *testing.T) {