Allow interval updating when no GPS fix & scheduling not supported.

Since Android-L we have the following isse for GPS chipsets that do not
have GPS_CAPABILITY_SCHEDULING:
1) A location request is ongoing with an interval < 1 minute that
mFixInterval < NO_FIX_TIMEOUT. In which case, the TimeOutIntent will
not be set
2) A new location request arrives with a large interval where we want
the TimeOutIntent to kick in if needed
3) The above scenario has to happen in GPS signal denied environment
with no fix possible as a single reported location will cause hibernate()
to be called and engine to be stopped

Bug:68827168
Test: Current tests pass.

Change-Id: I4b3abf4b6f91a8eeb119bdbdb19f2fb0ed9e28cd