BootMessage: show more info in boot dialog

Tell the users what package we are running dexOpt on currently
https://gerrit.omnirom.org/#/c/1830/1/

Change-Id: Icbad59ee3c67320338c44727cd5fc04e70c7cc4a
Switch from FloatMath to Math, better performance and

updated api

https://android.googlesource.com/platform/
frameworks/base/+/33253a4baa6279f81a73425b49dfb6abe5f5416e

Change-Id: I0181b1381f2843928993a9ca89d25e46f5956b20