Fix NPE in ApplicationStatus.

The return line being outside the synchronized block allowed the cached
state to be reset to null before it was calculated.

BUG=470966

Review URL: https://codereview.chromium.org/1031413005

Cr-Commit-Position: refs/heads/master@{#322479}

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

@@ -309,9 +309,8 @@ public static int getStateForApplication() {
             if (sCachedApplicationState == null) {
                 sCachedApplicationState = determineApplicationState();
             }
+            return sCachedApplicationState.intValue();
         }
-
-        return sCachedApplicationState.intValue();
     }
 
     /**