Make COLUMN_CAPACITY_BYTES public.

So providers can tell us total capacity.

Change-Id: Id990c417fcae4c6beee3e09dcb633b22e875e08f
diff --git a/api/current.txt b/api/current.txt
index a4f6607..b03b39d 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -31715,6 +31715,7 @@
 
   public static final class DocumentsContract.Root {
     field public static final java.lang.String COLUMN_AVAILABLE_BYTES = "available_bytes";
+    field public static final java.lang.String COLUMN_CAPACITY_BYTES = "capacity_bytes";
     field public static final java.lang.String COLUMN_DOCUMENT_ID = "document_id";
     field public static final java.lang.String COLUMN_FLAGS = "flags";
     field public static final java.lang.String COLUMN_ICON = "icon";
diff --git a/api/system-current.txt b/api/system-current.txt
index 2d5e7f6..c8620ea 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -34098,6 +34098,7 @@
 
   public static final class DocumentsContract.Root {
     field public static final java.lang.String COLUMN_AVAILABLE_BYTES = "available_bytes";
+    field public static final java.lang.String COLUMN_CAPACITY_BYTES = "capacity_bytes";
     field public static final java.lang.String COLUMN_DOCUMENT_ID = "document_id";
     field public static final java.lang.String COLUMN_FLAGS = "flags";
     field public static final java.lang.String COLUMN_ICON = "icon";
diff --git a/api/test-current.txt b/api/test-current.txt
index dcb2f32..4b7ab74 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -31730,6 +31730,7 @@
 
   public static final class DocumentsContract.Root {
     field public static final java.lang.String COLUMN_AVAILABLE_BYTES = "available_bytes";
+    field public static final java.lang.String COLUMN_CAPACITY_BYTES = "capacity_bytes";
     field public static final java.lang.String COLUMN_DOCUMENT_ID = "document_id";
     field public static final java.lang.String COLUMN_FLAGS = "flags";
     field public static final java.lang.String COLUMN_ICON = "icon";
diff --git a/core/java/android/provider/DocumentsContract.java b/core/java/android/provider/DocumentsContract.java
index 03a1ca6..0065cd9 100644
--- a/core/java/android/provider/DocumentsContract.java
+++ b/core/java/android/provider/DocumentsContract.java
@@ -478,7 +478,6 @@
         /**
          * Capacity of a root in bytes. This column is optional, and may be
          * {@code null} if unknown or unbounded.
-         * {@hide}
          * <p>
          * Type: INTEGER (long)
          */