fix: add splashscreen dependency to app as well

Author: erisu

templates/project/app/build.gradle

@@ -24,6 +24,12 @@ if (cordovaConfig.IS_GRADLE_PLUGIN_KOTLIN_ENABLED) {
     apply plugin: 'kotlin-android-extensions'
 }
 
+dependencies {
+    apply from: '../CordovaLib/cordova.gradle'
+
+    implementation "androidx.core:core-splashscreen:${cordovaConfig.ANDROIDX_CORE_SPLASHSCREEN_VERSION}"
+}
+
 buildscript {
     apply from: '../CordovaLib/cordova.gradle'