Picker on Android text no longer visible or interactive with just flex: 1

[sammjinks]

When using Picker on an Android device, prior versions allowed the display to be shown as expected with just flex: 1. Now, the display doesn't show properly, and the dropdown pickers are no longer interactive. Height has to be manually set to a non-zero value in order for the display to work.

Please address this in a future version so the picker works as expected with react native's stylesheet setup.

[bygiro]

check this, it solved for me. issue: #273