Revert "libstagefright: Fix incorrectness nPortIndex value for QueryCodec"

This reverts commit 9a814ad626233ff02dd2d393929f32225bc94b68.
This is wrong. kPortIndexInput is defined as 0, the original value was correct.
Additionally, it breaks android.media.cts.MediaCodecListTest

Change-Id: Ib273cde69a4c622daf239bab5d12c5e7d568af2f
diff --git a/media/libstagefright/OMXCodec.cpp b/media/libstagefright/OMXCodec.cpp
index d11381d..7d1dd8e 100644
--- a/media/libstagefright/OMXCodec.cpp
+++ b/media/libstagefright/OMXCodec.cpp
@@ -4835,7 +4835,7 @@
     // Color format query
     OMX_VIDEO_PARAM_PORTFORMATTYPE portFormat;
     InitOMXParams(&portFormat);
-    portFormat.nPortIndex = !isEncoder ? 0 : 1;
+    portFormat.nPortIndex = !isEncoder ? 1 : 0;
     for (portFormat.nIndex = 0;; ++portFormat.nIndex)  {
         err = omx->getParameter(
                 node, OMX_IndexParamVideoPortFormat,