fix: Add minSdk to all extension projects (#6778)

extensions/twitch/build.gradle.kts

@@ -11,9 +11,4 @@ android {
     defaultConfig {
         minSdk = 21
     }
-
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
-        targetCompatibility = JavaVersion.VERSION_11
-    }
 }

extensions/twitch/src/main/java/app/revanced/extension/twitch/settings/TwitchActivityHook.java

@@ -22,7 +22,7 @@ import tv.twitch.android.settings.SettingsActivity;
 /**
  * Hooks AppCompatActivity to inject a custom {@link TwitchPreferenceFragment}.
  */
-@SuppressWarnings({"deprecation", "NewApi", "unused"})
+@SuppressWarnings({"deprecation", "unused"})
 public class TwitchActivityHook {
     private static final int REVANCED_SETTINGS_MENU_ITEM_ID = 0x7;
     private static final String EXTRA_REVANCED_SETTINGS = "app.revanced.twitch.settings";