Unhide Resources APIs for getting resources at specific densities.

This adds Resources.getDrawableForDensity() and
Resources.getValueForDensity().  These are needed for applications
to correctly retrieve larger icons such as in launcher when
running on a tablet.  We had already exposed the APIs to tell the
application which density to use for app icons on the current
device, but didn't unhide these APIs that allowed you to
actually retrieve them.

This is safe to do without introducing a new API level (as long
as we do it soon) because we know these APIs already exist in
Android 4.0, and there is no reason for anyone to be removing
them when building a device.

Change-Id: I5138e5dc908197b66a98d20af73c5374cb5d41d3

Author: Dianne Hackborn

api/15.txt

@@ -6611,6 +6611,7 @@ package android.content.res {
     method public int getDimensionPixelSize(int) throws android.content.res.Resources.NotFoundException;
     method public android.util.DisplayMetrics getDisplayMetrics();
     method public android.graphics.drawable.Drawable getDrawable(int) throws android.content.res.Resources.NotFoundException;
+    method public android.graphics.drawable.Drawable getDrawableForDensity(int, int) throws android.content.res.Resources.NotFoundException;
     method public float getFraction(int, int, int);
     method public int getIdentifier(java.lang.String, java.lang.String, java.lang.String);
     method public int[] getIntArray(int) throws android.content.res.Resources.NotFoundException;
@@ -6633,6 +6634,7 @@ package android.content.res {
     method public java.lang.CharSequence[] getTextArray(int) throws android.content.res.Resources.NotFoundException;
     method public void getValue(int, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
     method public void getValue(java.lang.String, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
+    method public void getValueForDensity(int, int, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
     method public android.content.res.XmlResourceParser getXml(int) throws android.content.res.Resources.NotFoundException;
     method public final android.content.res.Resources.Theme newTheme();
     method public android.content.res.TypedArray obtainAttributes(android.util.AttributeSet, int[]);

api/current.txt

@@ -6611,6 +6611,7 @@ package android.content.res {
     method public int getDimensionPixelSize(int) throws android.content.res.Resources.NotFoundException;
     method public android.util.DisplayMetrics getDisplayMetrics();
     method public android.graphics.drawable.Drawable getDrawable(int) throws android.content.res.Resources.NotFoundException;
+    method public android.graphics.drawable.Drawable getDrawableForDensity(int, int) throws android.content.res.Resources.NotFoundException;
     method public float getFraction(int, int, int);
     method public int getIdentifier(java.lang.String, java.lang.String, java.lang.String);
     method public int[] getIntArray(int) throws android.content.res.Resources.NotFoundException;
@@ -6633,6 +6634,7 @@ package android.content.res {
     method public java.lang.CharSequence[] getTextArray(int) throws android.content.res.Resources.NotFoundException;
     method public void getValue(int, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
     method public void getValue(java.lang.String, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
+    method public void getValueForDensity(int, int, android.util.TypedValue, boolean) throws android.content.res.Resources.NotFoundException;
     method public android.content.res.XmlResourceParser getXml(int) throws android.content.res.Resources.NotFoundException;
     method public final android.content.res.Resources.Theme newTheme();
     method public android.content.res.TypedArray obtainAttributes(android.util.AttributeSet, int[]);

core/java/android/content/res/Resources.java

@@ -683,7 +683,6 @@ public Drawable getDrawable(int id) throws NotFoundException {
      * @throws NotFoundException Throws NotFoundException if the given ID does
      *             not exist.
      * @return Drawable An object that can be used to draw this resource.
-     * @hide
      */
     public Drawable getDrawableForDensity(int id, int density) throws NotFoundException {
         synchronized (mTmpValue) {
@@ -1032,7 +1031,6 @@ public void getValue(int id, TypedValue outValue, boolean resolveRefs)
      * @throws NotFoundException Throws NotFoundException if the given ID does
      *             not exist.
      * @see #getValue(String, TypedValue, boolean)
-     * @hide
      */
     public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs)
             throws NotFoundException {