diff --git a/.ci.yaml b/.ci.yaml
index a920ab83a766b..fc281a1b14e9d 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -10,6 +10,7 @@ enabled_branches:
   - dev
   - beta
   - stable
+  - flutter-2.6-candidate.11
 
 platform_properties:
   linux:
diff --git a/shell/platform/android/test_runner/build.gradle b/shell/platform/android/test_runner/build.gradle
index 704dc7c5b10c9..1cd44364bb34b 100644
--- a/shell/platform/android/test_runner/build.gradle
+++ b/shell/platform/android/test_runner/build.gradle
@@ -1,7 +1,7 @@
 buildscript {
   repositories {
     google()
-    jcenter()
+    mavenCentral()
   }
   dependencies {
     classpath "com.android.tools.build:gradle:7.0.0"
@@ -10,7 +10,7 @@ buildscript {
 
 repositories {
   google()
-  jcenter()
+  mavenCentral()
 }
 
 apply plugin: "com.android.library"
diff --git a/shell/platform/darwin/ios/framework/Info.plist b/shell/platform/darwin/ios/framework/Info.plist
index 420e8034b9277..7264dec38d4ef 100644
--- a/shell/platform/darwin/ios/framework/Info.plist
+++ b/shell/platform/darwin/ios/framework/Info.plist
@@ -21,7 +21,7 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>8.0</string>
+  <string>9.0</string>
   <key>FlutterEngine</key>
   <string>{0}</string>
   <key>ClangVersion</key>
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterSemanticsScrollView.mm b/shell/platform/darwin/ios/framework/Source/FlutterSemanticsScrollView.mm
index ad5dd0d19def6..2bdde791c62ca 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterSemanticsScrollView.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterSemanticsScrollView.mm
@@ -106,33 +106,4 @@ - (NSInteger)accessibilityElementCount {
   return [[_semanticsObject children] count];
 }
 
-- (id)accessibilityElementAtIndex:(NSInteger)index {
-  SemanticsObject* child = [_semanticsObject children][index];
-
-  // Swap the original `SemanticsObject` to a `PlatformViewSemanticsContainer`
-  if (child.node.IsPlatformViewNode()) {
-    child.platformViewSemanticsContainer.index = index;
-    return child.platformViewSemanticsContainer;
-  }
-
-  if ([child hasChildren])
-    return [child accessibilityContainer];
-  return [child nativeAccessibility];
-}
-
-- (NSInteger)indexOfAccessibilityElement:(id)element {
-  if ([element isKindOfClass:[FlutterPlatformViewSemanticsContainer class]]) {
-    return ((FlutterPlatformViewSemanticsContainer*)element).index;
-  }
-
-  NSArray<SemanticsObject*>* children = [_semanticsObject children];
-  for (size_t i = 0; i < [children count]; i++) {
-    SemanticsObject* child = children[i];
-    if ((![child hasChildren] && child == element) ||
-        ([child hasChildren] && [child accessibilityContainer] == element))
-      return i;
-  }
-  return NSNotFound;
-}
-
 @end
diff --git a/testing/android_background_image/android/build.gradle b/testing/android_background_image/android/build.gradle
index bfe1241ab2439..51b93f95dc279 100644
--- a/testing/android_background_image/android/build.gradle
+++ b/testing/android_background_image/android/build.gradle
@@ -3,7 +3,7 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.0'
@@ -16,7 +16,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 
diff --git a/testing/scenario_app/android/build.gradle b/testing/scenario_app/android/build.gradle
index 2308fb2bf6422..007f63430020b 100644
--- a/testing/scenario_app/android/build.gradle
+++ b/testing/scenario_app/android/build.gradle
@@ -3,7 +3,7 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.0'
@@ -23,7 +23,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 
diff --git a/tools/cipd/android_embedding_bundle/build.gradle b/tools/cipd/android_embedding_bundle/build.gradle
index e93098cf2ed7e..6c255757f9b96 100644
--- a/tools/cipd/android_embedding_bundle/build.gradle
+++ b/tools/cipd/android_embedding_bundle/build.gradle
@@ -12,7 +12,7 @@ def destinationDir = "lib"
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath "com.android.tools.build:gradle:3.5.0"
@@ -22,7 +22,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }