Refactor the filmstrip backing data.

- Remove unused fields and code.
- Rename classes and methods to be consistent with usage
- Make data more immutable
- Add Location and Metadata classes for typed data access.
- Use Date instead of long for DateTime representations.
- Filmstrip prefix for filmstrip specific code.
- Cleaner Glide implementations.
- Initialize Glide bitmap pool.
- Eagerly load large image sizes when scroll stops.

Change-Id: I3b51d42416ca076c80bf7db441d257659174b47d
58 files changed