Enable OperatorWrap check as a warning for Java presubmit.

There are currently 1072 violations of this check in chromium codebase.

BUG=318404

Review URL: https://codereview.chromium.org/650693003

Cr-Commit-Position: refs/heads/master@{#300563}

tools/android/checkstyle/chromium-style-5.0.xml

@@ -164,6 +164,17 @@
       <property name="throwsIndent" value="8"/>
       <property name="lineWrappingIndentation" value="8"/>
     </module>
+    <!-- TODO(aurimas): make OperatorWrap into an error once all the warnings are fixed. -->
+    <module name="OperatorWrap">
+      <property name="severity" value="warning"/>
+      <property name="option" value="NL" />
+      <property name="tokens" value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR, LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR " />
+    </module>
+    <module name="OperatorWrap">
+     <property name="severity" value="warning"/>
+     <property name="option" value="eol"/>
+     <property name="tokens" value="ASSIGN"/>
+    </module>
   </module>
   <module name="FileTabCharacter">
     <property name="severity" value="error"/>