May 2022 Security update

* raviole gki_kernel_tag handled manually this month,
  TODO: Script

Ref:
* https://groups.google.com/g/android-building/c/GoMawyG2l94/m/zB2a0UXCAgAJ

Change-Id: I236572036790189e9e6451ff8ee9a0e207d5f99f
diff --git a/vars/msm-4.14 b/vars/msm-4.14
index 1ddd9c1..6ce3b59 100644
--- a/vars/msm-4.14
+++ b/vars/msm-4.14
@@ -2,5 +2,5 @@
 
 # Updated manually
 
-readonly prev_kernel_tag=android-12.1.0_r0.2
-readonly kernel_tag=android-12.1.0_r0.13 # Apr 2022
+readonly prev_kernel_tag=android-12.1.0_r0.13 # Apr 2022
+readonly kernel_tag=android-12.1.0_r0.19 # May 2022