Add debug ramdisk variant.

A module will be installed to /debug_ramdisk if debug_ramdisk is set to
true.

This is a reland of f84e9c05e2, with a fix
that removes /first_stage_ramdisk.

Bug: 184004542
Test: soong test
Change-Id: I739de63cfec6b0fec5a90f7c4741fc4d884d209c

android/module.go

@@ -393,6 +393,7 @@ type ModuleContext interface {
 	InstallInSanitizerDir() bool
 	InstallInRamdisk() bool
 	InstallInVendorRamdisk() bool
+	InstallInDebugRamdisk() bool
 	InstallInRecovery() bool
 	InstallInRoot() bool
 	InstallBypassMake() bool
@@ -450,6 +451,7 @@ type Module interface {
 	InstallInSanitizerDir() bool
 	InstallInRamdisk() bool
 	InstallInVendorRamdisk() bool
+	InstallInDebugRamdisk() bool
 	InstallInRecovery() bool
 	InstallInRoot() bool
 	InstallBypassMake() bool
@@ -753,6 +755,9 @@ type commonProperties struct {
 	// Whether this module is installed to vendor ramdisk
 	Vendor_ramdisk *bool
 
+	// Whether this module is installed to debug ramdisk
+	Debug_ramdisk *bool
+
 	// Whether this module is built for non-native architectures (also known as native bridge binary)
 	Native_bridge_supported *bool `android:"arch_variant"`
 
@@ -1540,6 +1545,10 @@ func (m *ModuleBase) InstallInVendorRamdisk() bool {
 	return Bool(m.commonProperties.Vendor_ramdisk)
 }
 
+func (m *ModuleBase) InstallInDebugRamdisk() bool {
+	return Bool(m.commonProperties.Debug_ramdisk)
+}
+
 func (m *ModuleBase) InstallInRecovery() bool {
 	return Bool(m.commonProperties.Recovery)
 }
@@ -1593,6 +1602,10 @@ func (m *ModuleBase) InVendorRamdisk() bool {
 	return m.base().commonProperties.ImageVariation == VendorRamdiskVariation
 }
 
+func (m *ModuleBase) InDebugRamdisk() bool {
+	return m.base().commonProperties.ImageVariation == DebugRamdiskVariation
+}
+
 func (m *ModuleBase) InRecovery() bool {
 	return m.base().commonProperties.ImageVariation == RecoveryVariation
 }
@@ -2576,6 +2589,10 @@ func (m *moduleContext) InstallInVendorRamdisk() bool {
 	return m.module.InstallInVendorRamdisk()
 }
 
+func (m *moduleContext) InstallInDebugRamdisk() bool {
+	return m.module.InstallInDebugRamdisk()
+}
+
 func (m *moduleContext) InstallInRecovery() bool {
 	return m.module.InstallInRecovery()
 }