Update renamed PRESUBMIT function in docs

This CL updates the docs with function rename in
https://chromium-review.googlesource.com/c/chromium/src/+/2350234

Change-Id: Ia08ca3ef4d8b9bafa5b78889a1571bd0ccadce79
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2384650
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803109}

build/android/docs/java_toolchain.md

@@ -257,7 +257,7 @@ We use several tools for static analysis.
 ### [PRESUBMIT.py](/PRESUBMIT.py):
 * Checks for banned patterns via `_BANNED_JAVA_FUNCTIONS`.
   * (These should likely be moved to checkstyle).
-* Checks for a random set of things in `_AndroidSpecificOnUploadChecks()`.
+* Checks for a random set of things in `ChecksAndroidSpecificOnUpload()`.
   * Including running Checkstyle.
   * (Some of these other checks should likely also be moved to checkstyle).
 * Checks run only on changed lines.