Add support for Bitmark/Sprint mobile apps
For Android added,
- UnicodePlural - Maybe needed in the future
- Printf validator
- HTML Tag Insertable
For IOS added a new IOS variable validator.
Other notes,
- For Android, the xml file has a few string-array elements that we are not parsing.
- The headers output for IOS strings will not have created by
- Updated the copyright date to 2020
- Added a few strings to be ignored.
Bug: T246520
Depends-On: I490061131a3ddc76554f71613aa20cd3435a29ed
Depends-On: I9dca7bcf22e8d5ce8f4b1747f8823dda93631bec
Depends-On: Iec8b8691b8dd971548702b9daecc4d39ed2ef7f4
Change-Id: I332134ba588d97e376cb570b734b2c0473559300