Update uiautomator references in platform_testing/libraries/health/utils

* Remove unused dependencies.
* Replace "ub-uiautomator" (v2.2.0) with
  "androidx.test.uiautomator_uiautomator" (v2.3.0).

Bug: 235842600
Test: mmma .
Change-Id: If47c7e130edafc6217b14a0102870c35a4c3d437
2 files changed