Downgrade SuspiciousIndentation lint to a warning

Bug: 236431222
Test: Presubmits
Change-Id: Ia544b82a063a385fd39b543cfb28f439715a56bc
diff --git a/Android.bp b/Android.bp
index 82550dd..c769704 100644
--- a/Android.bp
+++ b/Android.bp
@@ -49,6 +49,9 @@
     sdk_version: "core_current",
     srcs: ["src/**/*.java"],
     errorprone: {
-        javacflags: ["-Xep:UnicodeInCode:WARN"]
-    }
+        javacflags: ["-Xep:UnicodeInCode:WARN"],
+    },
+    lint: {
+        warning_checks: ["SuspiciousIndentation"],
+    },
 }