[Android] Disable 2 extensions for application and application event.

Currently these 2 extensions are not supported on Android port.
Disable them since they're not supposed to work because it makes crashes.
Will enable them once Android port starts to fix them.

BUG=https://crosswalk-project.org/jira/browse/XWALK-674
Merge pull request #1337 from yongsheng/fix674

[Android] Disable 2 extensions for application and application event.