Revert "Revert "Remove a misleading "flush" function.""

This reverts commit 47da17740520f3d6ba952c65593f8660b89b8abf.

Reason for revert: Fixed the test broken by the original commit

Bug: 139192244
Bug: 140336855

Test: m -> flash -> boot
Test: atest CtsJvmtiAttachingHostTestCases

Change-Id: I4c67ad8709652c4710ef24564e0240f74f817f8c

1 files changed, 0 insertions, 14 deletions

diff --git a/core/java/android/bluetooth/BluetoothSocket.java b/core/java/android/bluetooth/BluetoothSocket.java
index a6e3153d6af7..760166bfcc5d 100644
--- a/core/java/android/bluetooth/BluetoothSocket.java
+++ b/core/java/android/bluetooth/BluetoothSocket.java
@@ -515,20 +515,6 @@ public final class BluetoothSocket implements Closeable {
         return mSocketIS.available();
     }
 
-    /**
-     * Wait until the data in sending queue is emptied. A polling version
-     * for flush implementation. Used to ensure the writing data afterwards will
-     * be packed in new RFCOMM frame.
-     *
-     * @throws IOException if an i/o error occurs.
-     */
-    @UnsupportedAppUsage
-    /*package*/ void flush() throws IOException {
-        if (mSocketOS == null) throw new IOException("flush is called on null OutputStream");
-        if (VDBG) Log.d(TAG, "flush: " + mSocketOS);
-        mSocketOS.flush();
-    }
-
     /*package*/ int read(byte[] b, int offset, int length) throws IOException {
         int ret = 0;
         if (VDBG) Log.d(TAG, "read in:  " + mSocketIS + " len: " + length);