Android: ignore LintError for absent class files

This is required to support changes in build/config repo
see https://chromium-review.googlesource.com/c/chromium/src/+/1308100

Bug: chromium:856189
Change-Id: I9571c52d46ee57e8d7aa45d17301529bd16d56d5
Reviewed-on: https://webrtc-review.googlesource.com/c/111102
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Commit-Queue: Artem Titarenko <artit@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25664}
diff --git a/tools_webrtc/android/suppressions.xml b/tools_webrtc/android/suppressions.xml
index 67e5b41..45375c2 100644
--- a/tools_webrtc/android/suppressions.xml
+++ b/tools_webrtc/android/suppressions.xml
@@ -22,7 +22,10 @@
 
   <issue id="GoogleAppIndexingWarning" severity="ignore"/>
   <issue id="MissingRegistered" severity="ignore"/>
-
+  <issue id="LintError">
+    <!-- We no longer supply class files to lint. -->
+    <ignore regexp="No `.class` files were found in project"/>
+  </issue>
   <!-- These are just from the dummy AndroidManifest.xml we use for linting.
        It's in the same directory as this file. -->
   <issue id="MissingApplicationIcon" severity="ignore"/>