Update Uwb config to use self-contained python binaries

Build from source and remove need for virtualenv to
make it self-contained.

Test: presubmit, forrest (https://android-build.googleplex.com/builds/abtd/run/L36500000954930737)
Bug: 234458076
Merged-In: I152e005a0574e1c47f4aa0c6b6bf8c6b212d24b7
Change-Id: Idb2f7c2ddbe5fdc5d75a349e0333773efbf4f05e
2 files changed