SystemUI: make clock and time clickable in statusbar

Clicking clock opens alarms, clicking the date will open the calendar.

Change-Id: I622527c1f144a8867aa543348b70a4fefe3f6403
Signed-off-by: Roman Birg <roman@cyngn.com>

(cherry picked from commit c7a4aa7d96d236835b187c72a82d7e6bf1231c3a)

(cherry picked from commit bfbedca0c4caf09746084e4300bb7153ca1c38b3)
SystemUI: make alarm text selector less blocky

It now matches the rest of the selectable items in the expanded header.
None of them had these boundries and neither should this.

Change-Id: I92041ee685a0c16f80c003658abbfd0a6143c07c
Signed-off-by: Roman Birg <roman@cyngn.com>

(cherry picked from commit 7a9c11f4396c07e1d6fd5e5913f4b8e500a9555e)

(cherry picked from commit f1cc4949f03b3940b4a82257ef0acf2cd7b9e6ce)