Flutter 3.16.3

[Casey Hillers]

We are pleased to announce the release of Flutter 3.16.2 to the stable channel; This hotfix release addresses the following issues:

• CVE-2023-6345 - Skia fix for possible integer overflow on Canvas calls with user generated data

• flutter/138550 - Fixes crash on iPad when selection "Share..." from selection controls.

• flutter/138842 - Fix rendering bug with elevation 0 material components.

• flutter/138850 - Add ability to customize NavigationBar indicator overlay and fixes a bug with the indicator shape.

• dart/53086 - DDS fix to ensure threadID integers are serialized correctly by Debug Adapter Protocol (DAP) clients.

• dart/53999 - Adjusts the nullablity computations in the implementation of the upper bound algorithm in the CFE

• dart/54112 - Fixes missing closure code completion entries for function parameters for LSP-based editors like VS Code.

In order to get the latest, run `flutter upgrade`.