Bump androidx.core:core from 1.13.1 to 1.15.0 in /android-refimpl-app

Bumps androidx.core:core from 1.13.1 to 1.15.0.

---
updated-dependencies:
- dependency-name: androidx.core:core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

android-refimpl-app/app/build.gradle

@@ -373,7 +373,7 @@ dependencies {
     //noinspection KtxExtensionAvailable
     implementation 'androidx.collection:collection:1.4.3'
     //noinspection KtxExtensionAvailable
-    implementation 'androidx.core:core:1.13.1'
+    implementation 'androidx.core:core:1.15.0'
     implementation 'androidx.appcompat:appcompat:1.6.1'
     //noinspection KtxExtensionAvailable
     implementation 'androidx.fragment:fragment:1.7.1'