Update language to comply with Android's inclusive language guidance

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


BUG=162536543

Change-Id: Iea1f8c3d2a253cad5a6a429389bbe3fc5fd4bc6b

core/java/android/os/DropBoxManager.java

@@ -276,7 +276,7 @@ public class DropBoxManager {
     }
 
     /**
-     * Create a dummy instance for testing.  All methods will fail unless
+     * Create an instance for testing. All methods will fail unless
      * overridden with an appropriate mock implementation.  To obtain a
      * functional instance, use {@link android.content.Context#getSystemService}.
      */

core/java/android/os/FileUtils.java

@@ -1302,7 +1302,7 @@ public final class FileUtils {
 
     /** {@hide} */
     public static int translateModeStringToPosix(String mode) {
-        // Sanity check for invalid chars
+        // Quick check for invalid chars
         for (int i = 0; i < mode.length(); i++) {
             switch (mode.charAt(i)) {
                 case 'r':