User can edit pet profiles / create posts

- [ ] Create ```Pet profile screen```
- [ ] Layout ```Pet profile screen```
   * Pet name
   * Pet bio
   * Pet age
   * Pet gender
   * Pet breed
   * Pet posts - Recycler view using grid layout manager
   * Edit/save
- [ ] Define Post model
- [ ] Implement Create Post FAB
   * Take picture
   * Upload file from file system 