[C+B] Add canPickup() method to Arrow. Adds BUKKIT-5480

#### The Issue
Can not check if an Arrow can be picked up using only the API

#### Justification for this PR
This PR adds that functionality :)

#### PR Breakdown
Access fromPlayer and return if Arrow can be picked up.

#### Testing Results and Materials
none

#### Relevant PR
https://github.com/Bukkit/Bukkit/pull/1051

#### JIRA-Ticket
https://bukkit.atlassian.net/browse/BUKKIT-5480