Fix some plural messages

[SafaAlfulaij]

This will fix some plural messages to be plural aware.

Tests: Not tested, based on logic.

Fixes #1922

Signed-off-by: Safa AlFulaij safa1996alfulaij@gmail.com

[giomfo]

@SafaAlfulaij: thank you for your contribution. But you must base your changes on the develop branch - not master (see https://github.com/vector-im/riot-android/blob/master/CONTRIBUTING.rst#how-to-contribute). Could you please update your PR?
It would be great if you can fix the conflict in the NotificationUtils.java file too.

By the way, you will have to sign off your PR (see https://github.com/vector-im/riot-android/blob/master/CONTRIBUTING.rst#sign-off) If you agree, all that's needed is to include the line in your commit or pull request comment:
Signed-off-by: Your Name your@email.example.org

[ylecollen]

LGTM

[SafaAlfulaij]

https://github.com/vector-im/riot-android/blob/b70bda3a9cd9dd5462eae0a850aed61242c3fa82/vector/src/main/java/im/vector/adapters/VectorPublicRoomsAdapter.java#L86

https://github.com/vector-im/riot-android/blob/f8cea1c50d994bd3a4ab062df04f6a635b6d3927/vector/src/main/java/im/vector/fragments/VectorRoomDetailsMembersFragment.java#L848

https://github.com/vector-im/riot-android/blob/b70bda3a9cd9dd5462eae0a850aed61242c3fa82/vector/src/main/java/im/vector/activity/VectorRoomActivity.java#L3102

PLEASE DONT MAKE PUZZLE STRINGS :(

Even with READ:{} popup