Proto commits in dtinit/data-transfer-project

These 3 commits are when the Protocol Buffers files have changed:

Commit:47a5a28
Author:Xuyang Fang
Committer:GitHub

update open sourced Apple extension and public apis to respect isFavorite field in common data model (#1365)

The documentation is generated from this commit.

Commit:556c269
Author:hgandhi90
Committer:GitHub

Adding Apple Music Importer extension (#1339) Co-authored-by: Jonathan Zacsh <j@zac.sh>

Commit:9aa25df
Author:Sundeep Paruvu
Committer:GitHub

Add Apple Photos Import extensions (#1232) * Apple Extensions * Remove idea gradle plugins * simplify video importer