LastApp Toggle [2/2]

Provides option for new LastApp Action in frameworks.
Can be used as NavBar or NavRing.

PS2 : Add icons by Hoolm.
PS3 : Remove unnecessary dependency

Signed-off-by: Zaphod <mwilson@acesappraisal.com>
Change-Id: Icda3a83f6cd8378f57043678c4535dcb8f245eec

 Changes to be committed:
	new file:   res/drawable-hdpi/ic_sysbar_lastapp.png
	new file:   res/drawable-mdpi/ic_sysbar_lastapp.png
	new file:   res/drawable-xhdpi/ic_sysbar_lastapp.png
	modified:   res/values/arrays.xml
	modified:   res/values/strings.xml
	modified:   src/com/raum/romcontrol/fragments/NavRingTargets.java
	modified:   src/com/raum/romcontrol/fragments/Navbar.java
fix menu icon

was fugly

 Changes to be committed:
	modified:   ../drawable-hdpi/ic_sysbar_menu_big.png
	modified:   ../drawable-mdpi/ic_sysbar_menu_big.png
	modified:   ic_sysbar_menu_big.png