Fix fatal error: LruCache in CachedServiceDecorator initialized with zero size.
Add tryGetSnippet(snippetId) to interface SnippetService.
Moves constants in EditSnippetActivity to begin of class.
Removes useless default timestamp on screen.
Fixes error: newly built Snippet has timestamp 0.
Changes ListSnippetActivity to retrieve snippets by cached SnippetService.
Adds async retrieving Snippet to EditSnippetActivity.
Suppresses SimpleDateFormat warnings.