Use uiautomator for uiautomator2

[KazuCocoa]

• ref:
  • investigate find_element/find_elements for uiautomator2 use uiautomator find_element/find_elements for uiautomator2 #560
  • separate find_element/s for uiautomator and xpath #547
  • fix button_exact, text_exact for uiautomator2 driver fix button_exact, text_exact for uiautomator2 driver #543

To improve stability.

All tests associated with this change are greened.

[KazuCocoa]

Hi @Edouard-chin and @rajdeepv,

I've tried to use uiautomator strategy for finding elements which I fixed before.
Could you try this branch if you have a time?
If @Edouard-chin's previous comment's flakiness comes from xpath strategy, this PR will fix it, I think.

[Edouard-chin]

Will be able to try later today !

[KazuCocoa]

Thanks so much!

[rajdeepv]

I am still in process of migration to uiautomator2. I will try to use this branch for few tests
Thanks

[Edouard-chin]

Sorry for the delay. I just tried your branch by running 10 automations, none of them failed 👍 .

[KazuCocoa]

Thanks!
I'll try this branch in my environment today, and I'll merge and release this if I have no failers.

[KazuCocoa]

https://github.com/appium/ruby_lib/releases/tag/v9.4.3

[Edouard-chin]

👍