sync a5 2017 asserts with lineage

* taken from https://github.com/LineageOS/android_device_samsung_a5y17lte/blob/lineage-19.1/BoardConfig.mk#L28

openandroidinstaller/assets/configs/a5y17lte.yaml

@@ -1,18 +1,19 @@
 metadata:
   maintainer: Tobias Sterbak (tsterbak)
   device_name: Samsung Galaxy A5 (2017)
-  is_ab_device: false 
+  is_ab_device: false
   device_code: a5y17lte
   supported_device_codes:
     - a5y17lte
     - a5y17ltecan
+    - a5y17ltexx
 steps:
   unlock_bootloader:
   boot_recovery:
     - type: call_button
       content: >
-        As a first step, you need to boot into the bootloader. A bootloader is the piece of software, 
-        that tells your phone how to start and run an operating system (like Android). Your device should be turned on. 
+        As a first step, you need to boot into the bootloader. A bootloader is the piece of software,
+        that tells your phone how to start and run an operating system (like Android). Your device should be turned on.
         Then press 'Confirm and run' to reboot into the bootloader. Continue once it's done.
       command: adb_reboot_download
     - type: call_button
@@ -23,6 +24,6 @@ steps:
     - type: confirm_button
       img: samsung-buttons.png
       content: >
-        Unplug the USB cable from your device. Then manually reboot into recovery by pressing the *Volume Down* + *Power buttons* for 8~10 seconds 
-        until the screen turns black & release the buttons immediately when it does, then boot to recovery with the device powered off, 
-        hold *Volume Up* + *Home* + *Power button*.
+        Unplug the USB cable from your device. Then manually reboot into recovery by pressing the *Volume Down* + *Power buttons* for 8~10 seconds
+        until the screen turns black & release the buttons immediately when it does, then boot to recovery with the device powered off,
+        hold *Volume Up* + *Home* + *Power button*.