Error Prone: Enable more errors

Change-Id: Iba0050f4be47197f2a1add3ce2e9d0b66cb283f9

tools/BUILD

diff --git a/tools/BUILD b/tools/BUILD
index 50cce2e..c42edd7 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -39,6 +39,16 @@
     name = "error_prone",
     javacopts = [
         "-XepDisableWarningsInGeneratedCode",
+        "-Xep:AmbiguousMethodReference:ERROR",
+        "-Xep:BadAnnotationImplementation:ERROR",
+        "-Xep:BadComparable:ERROR",
+        "-Xep:BoxedPrimitiveConstructor:ERROR",
+        "-Xep:CannotMockFinalClass:ERROR",
+        "-Xep:ClassNewInstance:ERROR",
+        "-Xep:DoubleCheckedLocking:ERROR",
+        "-Xep:ElementsCountedInLoop:ERROR",
+        "-Xep:StringEquality:ERROR",
+        "-Xep:MissingCasesInEnumSwitch:ERROR",
         "-Xep:WildcardImport:ERROR",
     ],
     packages = ["error_prone_packages"],