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New API related checks are some of our most valuable lint checks, as
triggering an error causes a crash directly.

This CL adds compile test targets to ensure that code with API level
errors trigger lint warnings. This prevents lint being accidentally
turned off.

Also delete now obsolete //build/android/lint directory and remove some
already-fixed suppressions from lint-suppressions.xml.

This is a reland of 3f2f2acf with
missing LintTest.java added back.

Tbr: mheikal@chromium.org
Bug: 1108309
Change-Id: Ic5ac63ccd8aac2ebd3193d26294b8e27b233c903
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416575Reviewed-by: Peter Wen <wnwen@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807963}