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
Bootmsg: The app name is now displayed in bold text.

Change-Id: I5e37527e3b00ef3889a029c707b54a514c7f0a22