altosdroid: Change voice output around

altosdroid: Change voice output around

This makes the voice output depend on the current displayed tab; where
the 'recovery' and 'map' tabs get the same value.

Pad

	Reports igniter and GPS status changes

Flight

	Report flight state changes and max height after apogee
	Report current speed, height and bearing/elevation/range once
	every 10 seconds while the rocket is in motion.

Recovery

	Report distance and bearing when the location of either the
	tracker or the receiver changes by more than 10m, but not more
	than once every 10 seconds.

Signed-off-by: Keith Packard <keithp@keithp.com>