Remove unnecessary FlaggedApi annotation from Layout.getText()

The `FlaggedApi` annotation must only be used for new APIs but
`Layout.getText()` has been in the public API since Android was first
checked into Android.

Bug: 304989985
Test: m checkapi
Change-Id: I7ae98f9495abffa1e483cae86c8d6f6ae2a400d9

core/api/current.txt

@@ -47195,7 +47195,7 @@ package android.text {
     method public void getSelectionPath(int, int, android.graphics.Path);
     method public final float getSpacingAdd();
     method public final float getSpacingMultiplier();
-    method @FlaggedApi("com.android.text.flags.use_bounds_for_width") @NonNull public final CharSequence getText();
+    method @NonNull public final CharSequence getText();
     method @FlaggedApi("com.android.text.flags.use_bounds_for_width") @NonNull public final android.text.TextDirectionHeuristic getTextDirectionHeuristic();
     method public abstract int getTopPadding();
     method @FlaggedApi("com.android.text.flags.use_bounds_for_width") public boolean getUseBoundsForWidth();

core/java/android/text/Layout.java

@@ -3913,7 +3913,6 @@ public abstract class Layout {
      * @see Layout.Builder
      */
     @NonNull
-    @FlaggedApi(FLAG_USE_BOUNDS_FOR_WIDTH)
     public final CharSequence getText() {
         return mText;
     }