feat: Bump minimum supported Flutter SDK >= 3.7.0 (#2001)

We need this
change(flutter/engine@90815e5),
which was released in Flutter SDK 3.7.0 to fix a crash on
Windows(#1999)

This PR is preparing for the fix.

.github/workflows/build.yml

@@ -85,8 +85,8 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
-    runs-on: macos-12
+        version: ["3.7.0", "3.x"]
+    runs-on: ubuntu-latest
     timeout-minutes: 120
     env:
       TEST_APP_ID: ${{ secrets.MY_APP_ID }}
@@ -115,7 +115,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.16"]
     runs-on: macos-12
     timeout-minutes: 120
     env:
@@ -136,7 +136,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.x"]
     runs-on: macos-12
     timeout-minutes: 120
     env:
@@ -155,8 +155,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        # Pin Flutter SDK version to 3.19, since there's issue with 3.22.x, see https://github.com/AgoraIO-Extensions/Agora-Flutter-SDK/actions/runs/9186647960/job/25262717666
-        version: ["2.10.5", "3.19"] 
+        version: ["3.7.0", "3.x"]
     runs-on: windows-2019
     timeout-minutes: 120
     env:
@@ -201,7 +200,7 @@ jobs:
     needs: flutter_codestyle_check
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.x"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -221,7 +220,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.x"]
     runs-on: windows-2019
     steps:
       - uses: actions/checkout@v3
@@ -242,7 +241,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.x"]
     runs-on: macos-12
     timeout-minutes: 120
     steps:
@@ -287,7 +286,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci:skip') }}
     strategy:
       matrix:
-        version: ["2.10.5", "3.x"]
+        version: ["3.7.0", "3.x"]
     runs-on: ubuntu-latest
     timeout-minutes: 120
     steps:

example/pubspec.yaml

@@ -6,7 +6,7 @@ description: Demonstrates how to use the agora_rtc_engine plugin.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 
 environment:
-  sdk: ">=2.16.1 <3.0.0"
+  sdk: ">=2.19.0 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

test_shard/fake_test_app/pubspec.yaml

@@ -18,8 +18,8 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.14.0 <3.0.0'
-  flutter: '>=2.0.0'
+  sdk: '>=2.19.0 <4.0.0'
+  flutter: '>=3.7.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

test_shard/integration_test_app/pubspec.yaml

@@ -18,7 +18,8 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.14.0 <3.0.0"
+  sdk: '>=2.19.0 <4.0.0'
+  flutter: '>=3.7.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

test_shard/iris_tester/pubspec.yaml

@@ -4,8 +4,8 @@ version: 0.0.1
 homepage:
 
 environment:
-  sdk: '>=2.14.0 <3.0.0'
-  flutter: '>=2.0.0'
+  sdk: '>=2.19.0 <4.0.0'
+  flutter: '>=3.7.0'
 
 dependencies:
   flutter:

test_shard/rendering_test/pubspec.yaml

@@ -18,8 +18,8 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.14.0 <3.0.0'
-  flutter: '>=2.0.0'
+  sdk: '>=2.19.0 <4.0.0'
+  flutter: '>=3.7.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions