Android R Preview 1 (RPP1.200123.016)
rustc-1.40.0 Build 6103218

Also remove 1.37.0, since we are migrating everyone at the same time:
* Soong
* android_rust (build rustc)

Bug: 146571186
Test: rustc builds, m crosvm.experimental; atest unicode-xid_device_tests_unicode_xid
Change-Id: I6f924891f5130aeac43f5c27157a5da73335d4a0
4006 files changed
tree: 98105c9ba3eaad6d4f6a898df6f1c4b23de736d5
  1. bootstrap/
  2. darwin-x86/
  3. linux-x86/