advanced reboot: add soft reboot option

Adds a "Soft reboot" option which restarts zygote, as requested in JIRA
CYAN-3998

Change-Id: Ia6e5ed9b053e1c5ebd1fc55e5692858b97f7e0fc
Signed-off-by: Roman Birg <roman@cyngn.com>
Themes: Fix icon filters clamping to wrong values

Change-Id: Iab3cce465f8bdfd7c30a020fda254728349c5ebe
Themes: Make sure composed icon info is meaningful

We don't want to try and create a composed icon if the parts that
make up a composed icon are not valid or set.

Change-Id: I3d9e7432e4b351de9c0a4e662e028932ee7f08e2