Fix typo in activity starter documentation

Change-Id: Ifda46cfd0340e16b51867d400c950c85b20e7758
Increase space for speciying width and height to 4 digits, rather than 3

Change-Id: I70e7091f11e730d7fbcdc84158108018a15f7f80
For location sensor, make sure AvailableProviders is initialized.
This addresses trac issue 684

Change-Id: I9182f1e3ce441a38c7f218c703290da7605d2cd8
Update listpicker documentation to include title property

Change-Id: Ifcd74950f75ba4496a8be8b033f9f63324ac9be7