boot: make some coding style fixes

This won't change any functionality, its
just for better reading.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
set mRefresherThread priority to minimum

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
aero: use runtime instead of regex for cpu

Instead of getting the available cpus with regular
expressions, use javas built in availableProcessors()
call.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
cpu: set cpu values for each cpu

Instead of setting the desired value only
for the first cpu (cpu0) we should set it
for all available cpus. This ensures we have
the same governors for all cpu in sync.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>