Disable verity for VABC updates on android R

Bug: 230277030
Test: th
Change-Id: I2872c490c852fb7d3784721e191ece80b4b1fd58

tools/releasetools/common.py

@@ -454,6 +454,11 @@ class BuildInfo(object):
         vendor_prop.GetProp("ro.virtual_ab.compression.enabled") == "true"
     return vabc_enabled
 
+  @property
+  def is_android_r(self):
+    system_prop = self.info_dict.get("system.build.prop")
+    return system_prop and system_prop.GetProp("ro.build.version.release") == "11"
+
   @property
   def is_vabc_xor(self):
     vendor_prop = self.info_dict.get("vendor.build.prop")