Tags: Use comma as a delimiter when adding tags to a note

Currently, Web/Electron and native MacOS use the comma character as a delimiter when adding tags to a note.
Based on some internal discussion p2XJRt-2Fi-p2 Android should work the same way.

### What
When adding tags to a note inputting the comma character should submit the tag and be used as a delimiter instead of being part of the tag.

### Why
This would help be consistent across the other platforms and follow other conventions.

Start by locating the Android note tag input handling and compare its delimiter behavior with the Web/Electron and native macOS clients. Verify the comma behavior when adding tags to a note, and confirm that a comma submits the current tag and separates it rather than becoming part of the tag.

Written by the indexing model from the issue text.