Remove unnecessary media permissions to comply with Google Play policy

[rileychh]

Summary

• Remove READ_MEDIA_IMAGES, READ_MEDIA_VIDEO, READ_MEDIA_AUDIO, READ_EXTERNAL_STORAGE, and WRITE_EXTERNAL_STORAGE permissions from Android manifest — the app only downloads files to app-scoped storage (getExternalStorageDirectory), which requires no permissions on any supported Android version (minSdk 24)
• Force-remove READ_MEDIA_* permissions contributed by the open_filex plugin via manifest merger using tools:node="remove"
• Simplify PermissionsUtil to always return true on Android since no storage permissions are needed for app-scoped storage, removing device_info_plus and permission_handler imports
• Remove NSPhotoLibraryUsageDescription from iOS Info.plist since the app does not access the photo library

Test plan

• Verify file downloads still work on Android without permission prompts
• Verify merged manifest contains no READ_MEDIA_* permissions after build
• Verify the file viewer page still opens downloaded files
• Submit to Google Play and confirm the policy violation is resolved

[Copilot]

Pull request overview

This PR aims to reduce platform permission surface area to comply with Google Play policy by removing unnecessary media/photo library permissions and simplifying the app’s runtime permission flow for file downloads.

Changes:

• Removed Android media read permissions (READ_MEDIA_*) and legacy READ_EXTERNAL_STORAGE from AndroidManifest.xml.
• Simplified Android storage permission checks in PermissionsUtil (no runtime permission requests on API 29+).
• Removed iOS NSPhotoLibraryUsageDescription from Info.plist.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
lib/src/util/permissions_util.dart	Simplifies Android storage permission logic based on SDK level.
ios/Runner/Info.plist	Removes photo library usage description entry.
android/app/src/main/AndroidManifest.xml	Removes media/external read permissions; keeps legacy write permission with maxSdkVersion.

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[bradly0cjw]

not nice