[image_picker] Upgrade androidx.activity to 1.7.0 and add a dependency on kotlin-bom to align kotlin transitive dependencies (flutter#3968)

Taking over flutter/packages#3536
bumps androidx.activity:activity to 1.7.0
Adds a workaround to fix duplicate class failures described here flutter#125062.

Author: gmackall

packages/image_picker/image_picker_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.8.6+15
+
+* Bumps androidx.activity:activity from 1.6.1 to 1.7.0.
+
 ## 0.8.6+14
 
 * Fixes Java warnings.

packages/image_picker/image_picker_android/android/build.gradle

@@ -41,7 +41,10 @@ android {
         implementation 'androidx.core:core:1.9.0'
         implementation 'androidx.annotation:annotation:1.3.0'
         implementation 'androidx.exifinterface:exifinterface:1.3.6'
-        implementation 'androidx.activity:activity:1.6.1'
+        implementation 'androidx.activity:activity:1.7.0'
+        // org.jetbrains.kotlin:kotlin-bom artifact purpose is to align kotlin stdlib and related code versions.
+        // See: https://youtrack.jetbrains.com/issue/KT-55297/kotlin-stdlib-should-declare-constraints-on-kotlin-stdlib-jdk8-and-kotlin-stdlib-jdk7
+        implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.10"))
 
         testImplementation 'junit:junit:4.13.2'
         testImplementation 'org.mockito:mockito-core:5.1.1'

packages/image_picker/image_picker_android/pubspec.yaml

@@ -3,7 +3,7 @@ description: Android implementation of the image_picker plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/image_picker/image_picker_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+image_picker%22
 
-version: 0.8.6+14
+version: 0.8.6+15
 
 environment:
   sdk: ">=2.18.0 <4.0.0"