April 2022 Security update

Change-Id: I26018393b36d896cef91c2c4022fa3cbaa9ddec7
diff --git a/vars/common b/vars/common
index a1e3072..44eae97 100644
--- a/vars/common
+++ b/vars/common
@@ -2,10 +2,10 @@
 readonly prev_lineageos_branch=lineage-19.0
 readonly lineageos_branch=lineage-19.1
 
-readonly prev_common_aosp_tag=android-12.1.0_r1 # Mar 2022, QC Pixels
-readonly common_aosp_tag=android-12.1.0_r2 # Mar 2022, Pixel 6
+readonly prev_common_aosp_tag=android-12.1.0_r2 # Mar 2022, Pixel 6
+readonly common_aosp_tag=android-12.1.0_r4 # Apr 2022, Pixel 6
 
-readonly prev_common_aosp_build_id=SP2A.220305.012 # Mar 2022, QC Pixels
-readonly common_aosp_build_id=SP2A.220305.013.A3 # Mar 2022, Pixel 6
+readonly prev_common_aosp_build_id=SP2A.220305.013.A3 # Mar 2022, Pixel 6
+readonly common_aosp_build_id=SP2A.220405.004 # Apr 2022, Pixel 6
 
-readonly topic=12L-raviole
+readonly topic=S_asb_2022-04