Update to newer Android Lint and suppress new Lint errors

base/android/java/src/org/chromium/base/ApplicationStatus.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.base;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.Application;
 import android.app.Application.ActivityLifecycleCallbacks;
@@ skipping 43 matching lines @@
         public ObserverList<ActivityStateListener> getListeners() {
             return mListeners;
         }
     }
 
     private static Object sCachedApplicationStateLock = new Object();
     @ApplicationState
     private static Integer sCachedApplicationState;
 
     /** Last activity that was shown (or null if none or it was destroyed). */
+    @SuppressLint("StaticFieldLeak")
     private static Activity sActivity;
 
     /** A lazily initialized listener that forwards application state changes to native. */
     private static ApplicationStateListener sNativeApplicationStateListener;
 
     /**
      * A map of which observers listen to state changes from which {@link Activity}.
      */
     private static final Map<Activity, ActivityInfo> sActivityInfo =
             new ConcurrentHashMap<Activity, ActivityInfo>();
@@ skipping 398 matching lines @@
 
         if (hasPausedActivity) return ApplicationState.HAS_PAUSED_ACTIVITIES;
         if (hasStoppedActivity) return ApplicationState.HAS_STOPPED_ACTIVITIES;
         return ApplicationState.HAS_DESTROYED_ACTIVITIES;
     }
 
     // Called to notify the native side of state changes.
     // IMPORTANT: This is always called on the main thread!
     private static native void nativeOnApplicationStateChange(@ApplicationState int newState);
 }