Exclude the version of dokka coming from AGP
Exclude the version of dokka coming from AGP

We're not using it, and it conflicts with dackka

Bug: 195305339
Test: Treehugger runs busytown/androidx.sh
Test: STUDIO_DIR=../studio-main ./frameworks/support/busytown/androidx-studio-integration.sh

Change-Id: Id613bc5133b72ca1bf7c57095d1776b08dc828c5

AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx