Handle RuntimeException in MemoryMonitorAndroid.getMemoryInfo

A RuntimeException can be thrown when we call
ActivityManager.getMemoryInfo() when the system is going to restart.
To avoid immediate crash, handle these exceptions gracefully.

BUG=668966

Review-Url: https://codereview.chromium.org/2545673002
Cr-Commit-Position: refs/heads/master@{#435568}
1 file changed