Revert "Clock: use mCalendar to get seconds"

This reverts commit 225bb4c0f916eca7fdb03a8fc7659388914e809d.
Revert "Frameworks/base: Second Clock (1/2)"

This reverts commit 0d55b51ac79f56063479db2fec247c14737cec19.

Conflicts:

	core/java/android/provider/Settings.java