[TIMOB-26873] Android: Add "style" property to "Ti.UI.OptionDialog" for bottom-sheet support

*Summary:* On Android, the Ti.UI.OptionDialog currently displays a modal dialog at the center of the screen. !Android-OptionDialog-Default.png|thumbnail! We would also like the ability to display the option dialog as a "BottomSheet" dialog based on Google's material design here... https://material.io/design/components/sheets-bottom.html !Android-OptionDialog-BottomStyle.png|thumbnail! *Recommended Solution:* Add a creation-only "style" property to Ti.UI.OptionDialog. By default (when not assigned), it would default to the current dialog we have. When the "style" property is set to a bottom-sheet constant, then it should use the [BottomSheetDialog](https://developer.android.com/reference/android/support/design/widget/BottomSheetDialog) Android class instead. *Note:* This feature is currently available via the following module... https://github.com/hansemannn/titanium-android-bottom-sheet