F1_score with multilabel classfiers(micro,macro) should be added

[shashvatshahi1998]

System information

• TensorFlow version (you are using): 1.13
• TensorFlow Addons version:
• Is it in the tf.contrib (if so, where):No
• Are you willing to contribute it (yes/no):yes
• Are you willing to maintain it going forward? (yes/no):yes

Describe the feature and the current behavior/state.
Basically there was an issue regarding computing f1 score for multilabel classifier(#27171) on tensorflow. So I tried to create a pr on which they asked to first add this feature on addons then depending on its usage it will be added in core. Link to my PR
tensorflow/tensorflow#28204
Will this change the current api? How?
Yes
Who will benefit with this feature?
Everyone who wants F1 score to be added.
Any Other info.

[shashvatshahi1998]

@seanpmorgan I wiill love to contribute but I think i have to first add metrics fiile in addons then f1 score. Can you please guide me regarding this?

[facaiy]

@shashvatshahi1998 Hi, Shashvat, do you have any update for us?

[seanpmorgan]

Tracking in #265