[dependabot]: Bump the test-dependencies group across 2 directories with 1 update

Bumps the test-dependencies group with 1 update in the /packages/pigeon/platform_tests/test_plugin/android directory: [io.mockk:mockk](https://github.com/mockk/mockk).
Bumps the test-dependencies group with 1 update in the /packages/shared_preferences/shared_preferences_android/android directory: [io.mockk:mockk](https://github.com/mockk/mockk).


Updates `io.mockk:mockk` from 1.13.13 to 1.13.16
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.13.13...1.13.16)

Updates `io.mockk:mockk` from 1.13.14 to 1.13.16
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.13.13...1.13.16)

---
updated-dependencies:
- dependency-name: io.mockk:mockk
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: test-dependencies
- dependency-name: io.mockk:mockk
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: test-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/pigeon/platform_tests/test_plugin/android/build.gradle

@@ -66,7 +66,7 @@ android {
 
     dependencies {
         testImplementation 'junit:junit:4.+'
-        testImplementation "io.mockk:mockk:1.13.14"
+        testImplementation "io.mockk:mockk:1.13.16"
         // 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:2.0.21"))

packages/shared_preferences/shared_preferences_android/android/build.gradle

@@ -67,7 +67,7 @@ android {
         testImplementation 'androidx.test.ext:junit-ktx:1.2.1'
         testImplementation 'org.robolectric:robolectric:4.12.1'
         testImplementation 'org.mockito:mockito-inline:5.2.0'
-        testImplementation 'io.mockk:mockk:1.13.14'
+        testImplementation 'io.mockk:mockk:1.13.16'
     }