refactor(mobile): map heatmap color and location picker (#6553)

* refactor(mobile): make location picker scaffold primary

* chore(mobile): update map heatmap colors

* style(mobile): map bottomsheet - only use borders on top

* fix(mobile): location picker show buttons above navigation bar

* fix: crash on iOS due to heatmap invalid color format

* disable rotate

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/lib/modules/map/widgets/map_asset_grid.dart

@@ -231,7 +231,14 @@ class _MapSheetDragRegion extends StatelessWidget {
       physics: const ClampingScrollPhysics(),
       child: Card(
         margin: EdgeInsets.zero,
-        shape: context.isMobile ? null : const BeveledRectangleBorder(),
+        shape: context.isMobile
+            ? const RoundedRectangleBorder(
+                borderRadius: BorderRadius.only(
+                  topRight: Radius.circular(20),
+                  topLeft: Radius.circular(20),
+                ),
+              )
+            : const BeveledRectangleBorder(),
         elevation: 0.0,
         child: Stack(
           children: [