Bump checker-qual from 2.11.1 to 3.5.0.

For unfortunate reasons involving internal legacy infrastructure, this is easier than merging google#4018. But at least it gets us on the newest major version. That makes it easier to see that it's safe to resolve a conflict between, say, 3.5.0 and 3.6.1 by just using the newer one.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=331554618

pom.xml

@@ -248,7 +248,7 @@
       <dependency>
         <groupId>org.checkerframework</groupId>
         <artifactId>checker-qual</artifactId>
-        <version>2.11.1</version>
+        <version>3.5.0</version>
       </dependency>
       <dependency>
         <groupId>com.google.errorprone</groupId>