afohrman 78fa15748f [Side Sheet] Added LeftSheetDelegate and left sheet support for standard and coplanar side sheets.
Standard and coplanar side sheets now support sliding and dragging from the left side, as well as automatic RTL mirroring when `layout_gravity` is set to `start` or `end`. Change the sheet edge by setting `layout_gravity` on the side sheet view in XML or programmatically.

PiperOrigin-RevId: 518048965
2023-03-20 21:25:55 +00:00
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