sm8550-common: Explicitly set as an non-AB target

We will be changing AB to be the default, existing non-AB targets
need to explicitly set AB_OTA_UPDATER to false

Test: th
Change-Id: I86a76296937a6abab1b4495cd66a35144348aafd

BoardConfigCommon.mk

@@ -16,6 +16,9 @@ TARGET_CPU_ABI2 :=
 TARGET_CPU_VARIANT := generic
 TARGET_CPU_VARIANT_RUNTIME := kryo300
 
+# A/B
+AB_OTA_UPDATER := false
+
 # Audio
 AUDIO_FEATURE_ENABLED_DLKM := true
 AUDIO_FEATURE_ENABLED_EXTENDED_COMPRESS_FORMAT := true