Set all remaining errorprone patterns to error level

There are no issues to fix for these.

Release-Notes: skip
Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Icf0f00f508dd04ccd296ecb3559c9505d826afd5

tools/BUILD

diff --git a/tools/BUILD b/tools/BUILD
index 5d63bcf..3665bc2 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -147,7 +147,7 @@
         "-Xep:EqualsUsingHashCode:ERROR",
         "-Xep:EqualsWrongThing:ERROR",
         "-Xep:ErroneousThreadPoolConstructorChecker:ERROR",
-        "-Xep:EscapedEntity:WARN",
+        "-Xep:EscapedEntity:ERROR",
         "-Xep:ExpectedExceptionChecker:ERROR",
         "-Xep:ExtendingJUnitAssert:ERROR",
         "-Xep:ExtendsAutoValue:ERROR",
@@ -242,7 +242,7 @@
         "-Xep:JavaLocalTimeGetNano:ERROR",
         "-Xep:JavaPeriodGetDays:ERROR",
         "-Xep:JavaTimeDefaultTimeZone:ERROR",
-        "-Xep:JavaUtilDate:WARN",
+        "-Xep:JavaUtilDate:ERROR",
         "-Xep:JdkObsolete:ERROR",
         "-Xep:JodaConstructors:ERROR",
         "-Xep:JodaDateTimeConstants:ERROR",