Add support to store history and favourite words.

[tirkarthi]

This PR implements a commonly requested feature to add support to have a list of words searched along with favourite words. The implementation involves a separate table to track the word, is_favourite and last_accessed_at time for sorting the list with recent entries. Whenever there is a word search or a notification lookup the word is recorded. If the same word is seen again then last_accessed_at time is updated. During notification lookup star action currently instead of read for testing toggles is_favourite to be 1 so that favourites page can list them. All favourites are a subset of historical entries. Since the table is stored in respective db the entries are per db and hence when user changes from English to French then the list will be empty. This is due to clicking on the entry from list so that the relevant language is used for lookup. E.g. Having test as a favourite under English and opting to French dictionary to lookup favourite English word doesn't make sense in French since there is no translation feature.

TODO :

• HistoryActivity.kt and FavouriteActivity.kt have almost same code except the layout inflation value and the method in dao to fetch all history entries and to fetch favourites respectively. Perhaps this can be refactored.
• Android atleast in Samsung galaxy A54 used for testing seems to only allow 3 actions from notifications. There is already copy, share and read. Perhaps one of them need to be removed.
• Clicking on the history/favourite word in listview should redirect to mainview to search the word.
• Support to delete entry from history page. DAO already has method, Need UI
• Support to unfavourite a word from favourites page. DAO already has method. Need UI.
• Test migrations and upgrade db in CDN for fresh installs to have history table.
• Test android room 2.5.0 is compatible with fdroid.

[tirkarthi]

fdroid compatibility needs build in CI but I don't anticipate any issues since room has been used previously and this is an upgrade of the version.