Some EPUB files are not downloading.

[MohitMaliFtechiz]

Describe the bug
A few EPUB files are not downloading in storage.

Expected behavior
It should download all the EPUB files.

Steps to reproduce the behavior:

1. Download Llyfrgell Prosiect Gutenberg - Llyfrau Cymraeg file.
2. Open it in the reader.
3. Open Y Gododin: A Poem of the Battle of Cattraeth article.
4. Click on the download image. You will see the error.
5. Now open another article e.g. Geiriadur Cymraeg a Saesneg Byr.
6. Click on the download image, it will download the epub file.

Environment

• Version of Kiwix Android: 3.9.1
• Device: Samsung A20
• OS version: Android 12

Logs

Couldn't save file
                                                                                                    java.io.FileNotFoundException: /storage/emulated/0/Download/org.kiwix/Y Gododin: A Poem of the Battle of Cattraeth.9842.epub: open failed: EPERM (Operation not permitted)
                                                                                                    	at libcore.io.IoBridge.open(IoBridge.java:492)
                                                                                                    	at java.io.FileOutputStream.<init>(FileOutputStream.java:236)
                                                                                                    	at java.io.FileOutputStream.<init>(FileOutputStream.java:186)
                                                                                                    	at org.kiwix.kiwixmobile.core.utils.files.FileUtils.downloadFileFromUrl(FileUtils.kt:464)
                                                                                                    	at org.kiwix.kiwixmobile.core.main.CoreWebViewClient.handleEpubAndPdf(CoreWebViewClient.kt:89)
                                                                                                    	at org.kiwix.kiwixmobile.core.main.CoreWebViewClient.shouldOverrideUrlLoading(CoreWebViewClient.kt:52)
                                                                                                    	at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(chromium-TrichromeWebViewGoogle.aab-stable-626106431:93)
                                                                                                    	at android.os.MessageQueue.nativePollOnce(Native Method)
                                                                                                    	at android.os.MessageQueue.next(MessageQueue.java:335)
                                                                                                    	at android.os.Looper.loop(Looper.java:206)
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8653)
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
                                                                                                    Caused by: android.system.ErrnoException: open failed: EPERM (Operation not permitted)
                                                                                                    	at libcore.io.Linux.open(Native Method)
                                                                                                    	at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
                                                                                                    	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:254)
                                                                                                    	at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
                                                                                                    	at android.app.ActivityThread$AndroidOs.open(ActivityThread.java:8514)
                                                                                                    	at libcore.io.IoBridge.open(IoBridge.java:478)

EPubNotOpening.mp4