Revert "Invoke geolocation permissions callback with denied state by default."

This reverts commit 954d1333.

The revert is due to apps calling super.onGeolocationPermissionsShowPrompt see b/22685046

Bug: 22685046
Change-Id: I2a9f42b432a010828a0cafaee064480bb0f91cbe
(cherry picked from commit 0bb7d2e4)