Update language to comply with Android’s inclusive language guidance

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

Bug: 161896447
Test: atest TextViewTest
Change-Id: I83f253f6edfb2724972793b3495835540b7b52e4

core/java/android/text/Html.java

@@ -549,7 +549,7 @@ public class Html {
                     out.append(((ImageSpan) style[j]).getSource());
                     out.append("\">");
 
-                    // Don't output the dummy character underlying the image.
+                    // Don't output the placeholder character underlying the image.
                     i = next;
                 }
                 if (style[j] instanceof AbsoluteSizeSpan) {

core/java/android/text/format/Time.java

@@ -361,7 +361,7 @@ public class Time {
      */
     @Override
     public String toString() {
-        // toString() uses its own TimeCalculator rather than the shared one. Otherwise crazy stuff
+        // toString() uses its own TimeCalculator rather than the shared one. Otherwise weird stuff
         // happens during debugging when the debugger calls toString().
         TimeCalculator calculator = new TimeCalculator(this.timezone);
         calculator.copyFieldsFromTime(this);

core/java/android/widget/Magnifier.java

@@ -918,7 +918,7 @@ public final class Magnifier {
             bitmapRenderNode.setOutline(outline);
             bitmapRenderNode.setClipToOutline(true);
 
-            // Create a dummy draw, which will be replaced later with real drawing.
+            // Create a placeholder draw, which will be replaced later with real drawing.
             final RecordingCanvas canvas = bitmapRenderNode.beginRecording(
                     mContentWidth, mContentHeight);
             try {