IOMX: allow configuration after going to loaded state

This was disallowed recently but we still use it as MediaCodcec.stop
only goes to loaded state, and does not free component.

Bug: 31450460
Change-Id: I72e092e4e55c9f23b1baee3e950d76e84a5ef28d
(cherry picked from commit 6392ae13cf6e15c706fce45396ec1e79af6171a9)
diff --git a/media/libstagefright/omx/OMXNodeInstance.cpp b/media/libstagefright/omx/OMXNodeInstance.cpp
index 35d5de6..d70ea47 100644
--- a/media/libstagefright/omx/OMXNodeInstance.cpp
+++ b/media/libstagefright/omx/OMXNodeInstance.cpp
@@ -372,8 +372,7 @@
 status_t OMXNodeInstance::sendCommand(
         OMX_COMMANDTYPE cmd, OMX_S32 param) {
     if (cmd == OMX_CommandStateSet) {
-        // We do not support returning from unloaded state, so there are no configurations past
-        // first StateSet command.
+        // There are no configurations past first StateSet command.
         mSailed = true;
     }
     const sp<GraphicBufferSource> bufferSource(getGraphicBufferSource());
@@ -1844,6 +1843,13 @@
             && arg2 == OMX_StateExecuting) {
         bufferSource->omxExecuting();
     }
+
+    // allow configuration if we return to the loaded state
+    if (event == OMX_EventCmdComplete
+            && arg1 == OMX_CommandStateSet
+            && arg2 == OMX_StateLoaded) {
+        mSailed = false;
+    }
 }
 
 // static