Update comment to use inclusive language

See https://source.android.com/setup/contribute/respectful-code for reference.

#inclusivefixit

Bug: 161896447
Test: None
Change-Id: I1b24350f4e4528ff40ef8d9065a2c5c4251c5059

core/java/android/security/net/config/NetworkSecurityConfig.java

@@ -216,7 +216,7 @@ public final class NetworkSecurityConfig {
          * in {@link Builder#build()}, recursively if needed.
          */
         public Builder setParent(Builder parent) {
-            // Sanity check to avoid adding loops.
+            // Quick check to avoid adding loops.
             Builder current = parent;
             while (current != null) {
                 if (current == this) {