BootMessage: Show each app name being optimized during boot

Below the message that says "Optimizing app x of y" the name of
the current app is displayed. This is the same as we had for kitkat.

Change-Id: I6a52c1991ec4dfa20fb501b2b26b2b6d3fa093d7
Merge "BootMessage: Show each app name being optimized during boot" into lp5.0