Remove non-required API M version checks

app/src/main/java/org/schabi/newpipe/player/ui/VideoPlayerUi.java

@@ -23,7 +23,6 @@
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffColorFilter;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
@@ -1584,28 +1583,23 @@ public void setupVideoSurfaceIfNeeded() {
             // make sure there is nothing left over from previous calls
             clearVideoSurface();
 
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { // >=API23
-                surfaceHolderCallback = new SurfaceHolderCallback(context, player.getExoPlayer());
-                binding.surfaceView.getHolder().addCallback(surfaceHolderCallback);
+            surfaceHolderCallback = new SurfaceHolderCallback(context, player.getExoPlayer());
+            binding.surfaceView.getHolder().addCallback(surfaceHolderCallback);
 
-                // ensure player is using an unreleased surface, which the surfaceView might not be
-                // when starting playback on background or during player switching
-                if (binding.surfaceView.getHolder().getSurface().isValid()) {
-                    // initially set the surface manually otherwise
-                    // onRenderedFirstFrame() will not be called
-                    player.getExoPlayer().setVideoSurfaceHolder(binding.surfaceView.getHolder());
-                }
-            } else {
-                player.getExoPlayer().setVideoSurfaceView(binding.surfaceView);
+            // ensure player is using an unreleased surface, which the surfaceView might not be
+            // when starting playback on background or during player switching
+            if (binding.surfaceView.getHolder().getSurface().isValid()) {
+                // initially set the surface manually otherwise
+                // onRenderedFirstFrame() will not be called
+                player.getExoPlayer().setVideoSurfaceHolder(binding.surfaceView.getHolder());
             }
 
             surfaceIsSetup = true;
         }
     }
 
     private void clearVideoSurface() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M // >=API23
-                && surfaceHolderCallback != null) {
+        if (surfaceHolderCallback != null) {
             binding.surfaceView.getHolder().removeCallback(surfaceHolderCallback);
             surfaceHolderCallback.release();
             surfaceHolderCallback = null;

app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java

@@ -2,7 +2,6 @@
 
 import android.content.SharedPreferences;
 import android.content.res.Resources;
-import android.os.Build;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.text.format.DateUtils;
@@ -33,8 +32,7 @@ public void onCreatePreferences(final Bundle savedInstanceState, final String ro
             // on M and above, if user chooses to minimise to popup player on exit
             // and the app doesn't have display over other apps permission,
             // show a snackbar to let the user give permission
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
-                    && getString(R.string.minimize_on_exit_key).equals(key)) {
+            if (getString(R.string.minimize_on_exit_key).equals(key)) {
                 final String newSetting = sharedPreferences.getString(key, null);
                 if (newSetting != null
                         && newSetting.equals(getString(R.string.minimize_on_exit_popup_key))

app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java

@@ -12,7 +12,6 @@
 import android.text.Html;
 import android.widget.Toast;
 
-import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AlertDialog;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
@@ -116,7 +115,6 @@ public static boolean checkPostNotificationsPermission(final Activity activity,
      * @param context {@link Context}
      * @return {@link Settings#canDrawOverlays(Context)}
      **/
-    @RequiresApi(api = Build.VERSION_CODES.M)
     public static boolean checkSystemAlertWindowPermission(final Context context) {
         if (!Settings.canDrawOverlays(context)) {
             if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
@@ -174,8 +172,7 @@ public static boolean checkSystemAlertWindowPermission(final Context context) {
      * @return whether the popup is enabled
      */
     public static boolean isPopupEnabledElseAsk(final Context context) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M
-                || checkSystemAlertWindowPermission(context)) {
+        if (checkSystemAlertWindowPermission(context)) {
             return true;
         } else {
             Toast.makeText(context, R.string.msg_popup_permission, Toast.LENGTH_LONG).show();