Update dependency com.google.gms:google-services to v4.3.15 (#8963)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ richtext = "0.16.0"
 [libraries]
 desugar = "com.android.tools:desugar_jdk_libs:1.2.2"
 android-shortcut-gradle = "com.github.zellius:android-shortcut-gradle-plugin:0.1.2"
-google-services-gradle = "com.google.gms:google-services:4.3.14"
+google-services-gradle = "com.google.gms:google-services:4.3.15"
 
 rxandroid = "io.reactivex:rxandroid:1.2.1"
 rxjava = "io.reactivex:rxjava:1.3.8"