Merge changes from topics "board_use_recovery_as_root_soong", "ramdisk"

* changes:
  libatomic / libgcc_stripped: ramdisk_available
  Add target.ramdisk
  Ramdisk modules install to correct location
  Add ramdisk image.

android/variable.go

@@ -317,6 +317,8 @@ type productVariables struct {
 	EnforceProductPartitionInterface *bool `json:",omitempty"`
 
 	InstallExtraFlattenedApexes *bool `json:",omitempty"`
+
+	BoardUsesRecoveryAsBoot *bool `json:",omitempty"`
 }
 
 func boolPtr(v bool) *bool {