Remove old-style support for translated second architectures

Translated second architectures now go in NativeBridgeArch instead
of DeviceSecondaryArch.

This reapplies I568046330abc002d4eed582cb999b62a5eaba790 with
ctx.Config().HasMulitlibConflict() added to fix the NDK build,
which has arm64, arm, x86_64, and x86 architectures enabled.

Test: m checkbuild
Test: OUT_DIR=out_ndk build/soong/scripts/build-ndk-prebuilts.sh
Test: no change to build.ninja or Android-aosp_cf_x86_phone.mk
Change-Id: Iadcafbd64bfb9579ae7c86914927c43a062b0c8e
diff --git a/android/config.go b/android/config.go
index cb1bdf5..209b4de 100644
--- a/android/config.go
+++ b/android/config.go
@@ -93,6 +93,10 @@
 	BuildOsVariant       string
 	BuildOsCommonVariant string
 
+	// multilibConflicts for an ArchType is true if there is earlier configured device architecture with the same
+	// multilib value.
+	multilibConflicts map[ArchType]bool
+
 	deviceConfig *deviceConfig
 
 	srcDir   string // the path of the root source directory
@@ -240,10 +244,10 @@
 	config := testConfig.config
 
 	config.Targets[Android] = []Target{
-		{Android, Arch{ArchType: X86_64, ArchVariant: "silvermont", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", ""},
-		{Android, Arch{ArchType: X86, ArchVariant: "silvermont", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", ""},
-		{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeEnabled, "x86_64", "arm64"},
-		{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeEnabled, "x86", "arm"},
+		{Android, Arch{ArchType: X86_64, ArchVariant: "silvermont", Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", ""},
+		{Android, Arch{ArchType: X86, ArchVariant: "silvermont", Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", ""},
+		{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Abi: []string{"arm64-v8a"}}, NativeBridgeEnabled, "x86_64", "arm64"},
+		{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Abi: []string{"armeabi-v7a"}}, NativeBridgeEnabled, "x86", "arm"},
 	}
 
 	return testConfig
@@ -255,7 +259,7 @@
 
 	config.Targets = map[OsType][]Target{
 		Fuchsia: []Target{
-			{Fuchsia, Arch{ArchType: Arm64, ArchVariant: "", Native: true}, NativeBridgeDisabled, "", ""},
+			{Fuchsia, Arch{ArchType: Arm64, ArchVariant: ""}, NativeBridgeDisabled, "", ""},
 		},
 		BuildOs: []Target{
 			{BuildOs, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", ""},
@@ -272,8 +276,8 @@
 
 	config.Targets = map[OsType][]Target{
 		Android: []Target{
-			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", ""},
-			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", ""},
+			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled, "", ""},
+			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled, "", ""},
 		},
 		BuildOs: []Target{
 			{BuildOs, Arch{ArchType: X86_64}, NativeBridgeDisabled, "", ""},
@@ -305,8 +309,9 @@
 
 		env: originalEnv,
 
-		srcDir:   srcDir,
-		buildDir: buildDir,
+		srcDir:            srcDir,
+		buildDir:          buildDir,
+		multilibConflicts: make(map[ArchType]bool),
 	}
 
 	config.deviceConfig = &deviceConfig{
@@ -360,6 +365,14 @@
 		targets[Android] = androidTargets
 	}
 
+	multilib := make(map[string]bool)
+	for _, target := range targets[Android] {
+		if seen := multilib[target.Arch.ArchType.Multilib]; seen {
+			config.multilibConflicts[target.Arch.ArchType] = true
+		}
+		multilib[target.Arch.ArchType.Multilib] = true
+	}
+
 	config.Targets = targets
 	config.BuildOsVariant = targets[BuildOs][0].String()
 	config.BuildOsCommonVariant = getCommonTargets(targets[BuildOs])[0].String()
@@ -852,6 +865,10 @@
 	return Bool(c.productVariables.VndkSnapshotBuildArtifacts)
 }
 
+func (c *config) HasMultilibConflict(arch ArchType) bool {
+	return c.multilibConflicts[arch]
+}
+
 func (c *deviceConfig) Arches() []Arch {
 	var arches []Arch
 	for _, target := range c.config.Targets[Android] {
@@ -1009,19 +1026,6 @@
 	return "", false
 }
 
-// SecondArchIsTranslated returns true if the primary device arch is X86 or X86_64 and the device also has an arch
-// that is Arm or Arm64.
-func (c *config) SecondArchIsTranslated() bool {
-	deviceTargets := c.Targets[Android]
-	if len(deviceTargets) < 2 {
-		return false
-	}
-
-	arch := deviceTargets[0].Arch
-
-	return (arch.ArchType == X86 || arch.ArchType == X86_64) && hasArmAndroidArch(deviceTargets)
-}
-
 func (c *config) IntegerOverflowDisabledForPath(path string) bool {
 	if c.productVariables.IntegerOverflowExcludePaths == nil {
 		return false