tree ffac327a6b08c64d8876701c0f7d8a7e489358b6
parent 77a6c0dd2b4a1ea85cd7388f2d6e09f4e3808430
author Alex Fandrianto <alexfandrianto@google.com> 1460759371 -0700
committer Ross Wang <rosswang@google.com> 1461117683 -0700

TBR: java/projects/todos: Allow Screen Rotation. Use Cards

Initializing Firebase only once (Singleton) to allow for screen
rotation to succeed.

Use Cards to show TodoLists and Tasks.

Change-Id: I8221d8bb1a6dd6ea3e3adc1ded25ca8dbc7ccccc