Remove the aidl tool

This has been moved into its own repository at

//system/tools/aidl

Test: Built aosp_arm-eng from scratch.
Bug: 23691099

(cherry-pick of commit 73ea1230fc2a4007973efe3730d482d7bc6cf87a)

Change-Id: I993f2f08ed476e1cce6f39b58fed8eca2f2ce979
20 files changed