Android: Update DFM markdown with latest native code guidance

Bug: None
Change-Id: I69df296a38cf8f082cff6e05b6fc5c81cce9da90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1991751
Commit-Queue: Christopher Grant <[email protected]>
Reviewed-by: Samuel Huang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#729959}
1 file changed