Disable an Error Prone check incompatible with Java 12 (#100)

java_common.gradle

@@ -21,6 +21,12 @@ tasks.withType(JavaCompile).configureEach {
             asArguments: {
                 return ['-XepExcludedPaths:.*/build/generated/.*']
             }] as CommandLineArgumentProvider)
+    // Disable features currently incompatible with Java 12
+    if ((JavaVersion.current().majorVersion as Integer) > 11) {
+      // This check is broken in Java 12.
+      // See https://github.com/google/error-prone/issues/1257
+      options.errorprone.errorproneArgs=['-Xep:Finally:OFF']
+    }
 }
 
 version = '1.0'