Use errorprone.extra_check_modules for error prone checks

Using plugins for error prone checks causes them to be moved from
javac to kotlin, breaking the errorprone javac run which can no longer
find the checks requested in the errorprone javacflags.  Move the
checks to errorprone.extra_check_modules that will always apply to
the errorprone javac run.

Fixes: 190418963
Test: m RUN_ERROR_PRONE=true StatementService
Change-Id: I342d9129cf2ca769041c1be1c82498e27db45903
diff --git a/packages/StatementService/Android.bp b/packages/StatementService/Android.bp
index a0d8ac9..ff1a756 100644
--- a/packages/StatementService/Android.bp
+++ b/packages/StatementService/Android.bp
@@ -22,8 +22,7 @@
 
 android_app {
     name: "StatementService",
-    // Removed because Errorprone doesn't work with Kotlin, can fix up in the future
-    // defaults: ["platform_app_defaults"],
+    defaults: ["platform_app_defaults"],
     srcs: [
         "src/**/*.java",
         "src/**/*.kt",