[AND-12] Improve media storage permission handling.

[VelikovPetar]

🎯 Goal

Linear: https://linear.app/stream/issue/AND-12/improve-storage-access-permission-behaviour-with-limited-access
Adds support for partial media access for Android 14+.
More details: https://developer.android.com/about/versions/14/changes/partial-photo-video-access

🛠 Implementation details

• Add READ_MEDIA_VISUAL_USER_SELECTED to AndroidManifest to ensure media re-selection is properly handled on Android 14+.
• Add granular permission handling for AttachmentsPickerImagesTabFactory based on the different android versions (12 and below, 13 and 14 and above)
• Add new UI options in the images/videos picker to initiate media re-selection on Android 14+.
• Add granular permission handling for AttachmentsPickerFilesTabFactory based on the different android versions (12 and below, 13 and 14 and above)
• Add new UI options in the files picker to handle the visual media permission separately from the audio permissions + add option for media re-selection on Android 14+.

🎨 UI Changes

Note: I tried to keep the UI as similar as possible as before, but I am open for suggestions on improving it

Android 12 (single storage permission)	Android 13 (separate permissions)	Android 14 (separate permissions + partial access)
android-12-single-permission.mp4	android-13-separate-permissions.mp4	android-14-partial-access.mp4

🧪 Testing

1. Open Compose sample app
2. Open a channel
3. Tap the attachments button
4. Use the images/files tabs to see if the permissions are handled correctly (different behaviour for Android 12 / 13 / 14+)