Make IME extract text fields public

InputMethodService uses the following IDs for extract view.
- R.id.inputExtractEditText
- R.id.inputExtractAction
- R.id.inputExtractAccessories
While the first one is public, others are not. It makes sense to make
all of the public so IMEs can customize it.

Bug: 210777608
Test: atest InputMethodServiceTest

Change-Id: I125767d67839293c0b0f40c750d0fb1bb77951e9

core/api/current.txt

@@ -2103,6 +2103,8 @@ package android {
     field public static final int icon_frame = 16908350; // 0x102003e
     field public static final int input = 16908297; // 0x1020009
     field public static final int inputArea = 16908318; // 0x102001e
+    field public static final int inputExtractAccessories;
+    field public static final int inputExtractAction;
     field public static final int inputExtractEditText = 16908325; // 0x1020025
     field @Deprecated public static final int keyboardView = 16908326; // 0x1020026
     field public static final int list = 16908298; // 0x102000a

core/java/android/inputmethodservice/InputMethodService.java

@@ -2175,10 +2175,12 @@ public class InputMethodService extends AbstractInputMethodService {
     }
     
     /**
-     * Called by the framework to create the layout for showing extacted text.
+     * Called by the framework to create the layout for showing extracted text.
      * Only called when in fullscreen mode.  The returned view hierarchy must
      * have an {@link ExtractEditText} whose ID is 
-     * {@link android.R.id#inputExtractEditText}.
+     * {@link android.R.id#inputExtractEditText}, with action ID
+     * {@link android.R.id#inputExtractAction} and accessories ID
+     * {@link android.R.id#inputExtractAccessories}.
      */
     public View onCreateExtractTextView() {
         return mInflater.inflate(

core/res/res/values/ids.xml

@@ -59,6 +59,12 @@
   <item type="id" name="candidatesArea" />
   <item type="id" name="inputArea" />
   <item type="id" name="inputExtractEditText" />
+  <!-- View id for the action of text editor inside of an extracted text
+        {@link InputMethodService#onCreateExtractTextView IME extract view}. -->
+  <item type="id" name="inputExtractAction" />
+  <!-- View id for the accessories of text editor inside of an extracted text
+        {@link InputMethodService#onCreateExtractTextView IME extract view}. -->
+  <item type="id" name="inputExtractAccessories" />
   <item type="id" name="selectAll" />
   <item type="id" name="cut" />
   <item type="id" name="copy" />

core/res/res/values/public.xml

@@ -3267,6 +3267,8 @@
     <public name="accessibilityActionSwipeUp" />
     <public name="accessibilityActionSwipeDown" />
     <public name="accessibilityActionShowSuggestions" />
+    <public name="inputExtractAction" />
+    <public name="inputExtractAccessories" />
   </staging-public-group>
 
   <staging-public-group type="style" first-id="0x01dd0000">