Update terminology and provide quick Tasker example

[davidgro]

Getting this intent working was confusing with the old terminology, and lack of documentation on Tasker's side. After figuring it out, I would like to help others who may want to try and use this feature.

[franzalex]

@sriharshaarangi what do you think of me adding instructions on how to set the charge limit from Automate, another popular Android automation app?

[sriharshaarangi]

@franzalex Yes, you can!