Remove permissions for Google Ads since they no longer exist. Properly set the minSDK to 21.

app/build.gradle.kts

@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId = "apps.hyperling.com.platformer"
-        minSdk = 14
+        minSdk = 21
         targetSdk = 37
         versionCode = 13
         versionName = "0.1.0"
@@ -43,7 +43,7 @@ android {
 
 dependencies {
     implementation(libs.androidx.appcompat)
-    
+
     testImplementation(libs.junit)
     androidTestImplementation(libs.junit.ext)
     androidTestImplementation(libs.espresso.core)