[geolocator_android]: Bump androidx.core:core

Bumps androidx.core:core from 1.13.0 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]

geolocator_android/android/build.gradle

@@ -42,7 +42,7 @@ android {
 
 dependencies {
     implementation 'com.google.android.gms:play-services-location:21.2.0'
-    implementation 'androidx.core:core:1.13.0'
+    implementation 'androidx.core:core:1.15.0'
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.mockito:mockito-core:5.1.1'