Revert "Add new intent to prompt user for their device credential."

Move API to KeyguardManager.

Fixes bug 17006280

This reverts commit 2e7beadedeb7d41d8c2d1cc62956bdd9f5081d26.

Change-Id: I7b58bb4d9db828028c1021f17b01745c5ec2161e

Conflicts:
	core/java/android/content/Intent.java
2 files changed