Add sanitize.address to product_variables.eng

statsd enables ASAN in eng builds.

Test: m checkbuild
Change-Id: Ie25e1be55e14043a866d881b378cdd8d38ad356e

android/variable.go

@@ -95,6 +95,9 @@ type variableProperties struct {
 			Lto      struct {
 				Never *bool
 			}
+			Sanitize struct {
+				Address *bool
+			}
 		}
 
 		Pdk struct {