Android: Update cmdline-tools to 3.0

From v2.1 to v3.0, this is required to use new custom lint checks in
aars' lint.jar files.

Updated baseline accordingly.

Bug: 1142927
Change-Id: Id078b9a7a56c37ed6e40483adbffdeaed63b718a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2490990
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Lambros Lambrou <lambroslambrou@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
Auto-Submit: Peter Wen <wnwen@chromium.org>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822271}
GitOrigin-RevId: 92199fe2a0d2adf861ef63bd3b3fe484ad2af00f

README.chromium

diff --git a/README.chromium b/README.chromium
index 7d15c68..ab66ba5 100644
--- a/README.chromium
+++ b/README.chromium
@@ -2,7 +2,7 @@
 URL: http://developer.android.com/sdk/index.html
 Version: 30
   Android SDK Build-tools 30.0.1
-  Android SDK Command-line Tools 2.1
+  Android SDK Command-line Tools 3.0
   Android SDK Emulator 30.0.12
   Android SDK Platform-tools 30.0.3
   Android SDK Platform API 30