Clean up webkit test app task creation
Clean up webkit test app task creation

Do not force-create all tasks during project configuration.
Instead depend on the named task directly.

Test: ./gradlew bOS --dry-run --console=plain -> before and after the
      same
      ./gradlew projects --scan -> we create ~200 tasks less during
      configuration
Bug: 144507122

Change-Id: I6d2ee3a4888f1a443617443aa76eed3fb613ca4e

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