Disable 10secs forward/backward seeking for rtsp as seek is a very expensive operation there. Decouple the 10sec forward/backward button functionality from seekbar functionality.

Change-Id: I016e79b688774f8ee91ac53216197b5fb9cb41b2
related-to-bug: 3073955
diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index 8c17aab..53543b3 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -868,9 +868,7 @@
 }
 
 status_t AwesomePlayer::seekTo(int64_t timeUs) {
-    if (mExtractorFlags
-            & (MediaExtractor::CAN_SEEK_FORWARD
-                | MediaExtractor::CAN_SEEK_BACKWARD)) {
+    if (mExtractorFlags & MediaExtractor::CAN_SEEK) {
         Mutex::Autolock autoLock(mLock);
         return seekTo_l(timeUs);
     }