Revert "Android: Turn on errorprone by default"

This reverts commit 12234368.

Reason for revert: Looks like a source of these build failures: https://build.chromium.org/p/chromium.android/builders/Android%20Cronet%20ARM64%20Builder%20%28dbg%29/builds/69753

Original change's description:
> Android: Turn on errorprone by default
> 
> BUG=383646
> 
> Change-Id: Ia87d2dff787ffc5e4a59aca1af81a0ac9b727b4a
> Reviewed-on: https://chromium-review.googlesource.com/702574
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Commit-Queue: Peter Wen <wnwen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#506831}

TBR=wnwen@chromium.org,agrieve@chromium.org

Change-Id: Ie933459d048c090df574bf45b6e2b644de3e66e4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 383646
Reviewed-on: https://chromium-review.googlesource.com/703395Reviewed-by: Ken Rockot <rockot@chromium.org>
Commit-Queue: Ken Rockot <rockot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506840}

build/config/android/config.gni

@@ -137,8 +137,8 @@ if (is_android) {
     # Mark APKs as android:debuggable="true".
     debuggable_apks = !is_official_build
 
-    # Set to false to disable the Errorprone compiler
-    use_errorprone_java_compiler = true
+    # Set to true to enable the Errorprone compiler
+    use_errorprone_java_compiler = false
 
     # Enables EMMA Java code coverage. Instruments classes during build to
     # produce .ec files during runtime