Remove Assert lint suppression.

tools-webrtc/android/suppressions.xml

 <?xml version="1.0" encoding="utf-8"?>
 <lint>
   <!-- These lint settings is for the Android linter that gets run by
        lint_action.gypi on compile of WebRTC java code. All WebRTC java code
        should lint cleanly for the issues below. -->
   <!-- TODO(phoglund): make work with suppress.py or remove printout referring
        to suppress.py. -->
 
-  <issue id="Assert" severity="ignore"/>
   <issue id="UseSparseArrays" severity="ignore"/>
 
   <issue id="LongLogTag" severity="ignore"/>
   <issue id="Registered" severity="ignore"/>
   <issue id="MissingPermission" severity="ignore"/>
   <issue id="CommitPrefEdits" severity="ignore"/>
   <issue id="UnusedResources" severity="ignore"/>
   <issue id="IconColors" severity="ignore"/>
   <issue id="IconDipSize" severity="ignore"/>
   <issue id="IconDuplicatesConfig" severity="ignore"/>
   <issue id="RelativeOverlap" severity="ignore"/>
   <issue id="RtlCompat" severity="ignore"/>
   <issue id="IconMissingDensityFolder" severity="ignore"/>
   <issue id="OldTargetApi" severity="ignore"/>
 
   <issue id="GoogleAppIndexingWarning" severity="ignore"/>
   <issue id="MissingRegistered" severity="ignore"/>
 
   <!-- These are just from the dummy AndroidManifest.xml we use for linting.
        It's in the same directory as this file. -->
   <issue id="MissingApplicationIcon" severity="ignore"/>
   <issue id="AllowBackup" severity="ignore"/>
   <issue id="MissingVersion" severity="ignore"/>
 
   <!-- Ignore all lint errors in Chromium code. -->
   <issue id="all">
     <ignore path="**/org/chromium/**/*.java" />
   </issue>
 </lint>