Added support for flash image in both slots

Change-Id: Iafda62a5f77f7c1f564f1a2ec0a59aefaf5e1266
diff --git a/gui/theme/common/languages/en.xml b/gui/theme/common/languages/en.xml
index 3bc7a14..16dccf5 100755
--- a/gui/theme/common/languages/en.xml
+++ b/gui/theme/common/languages/en.xml
@@ -740,6 +740,7 @@
 		<string name="unmount_system_err">Failed unmounting System</string>
 		<string name="flash_ab_inactive">Flashing A/B zip to inactive slot: {1}</string>
 		<string name="flash_ab_reboot">To flash additional zips, please reboot recovery to switch to the updated slot.</string>
+		<string name="flash_ab_both_slots">Flash to both slots</string>
 		<string name="ozip_decrypt_decryption">Starting Ozip Decryption...</string>
 		<string name="ozip_decrypt_finish">Ozip Decryption Finished!</string>
 		<string name="fbe_wipe_msg">WARNING: {1} wiped. FBE device should be booted into Android and not Recovery to set initial FBE policy after wipe.</string>