Fix Issue #35489: drm content corruption on GB

If rawContent is copied into mediaBuf, readBuf is copied to wrong address.
mediaBuf should be forwarded by readBytes.

Change-Id: I4fc9c1f7f4e3d5dfe3c7e5cd92261608f6b3e248
Signed-off-by: git-you.kim72.gmail.com <you.kim72@gmail.com>

Author: YouKim

media/libdrm/mobile1/src/objmng/drm_api.c

@@ -1478,13 +1478,13 @@ static int32_t drm_readBinaryContentFromInputStream(T_DRM_Session_Node* s, int32
 
     if (NULL != s->readBuf && s->readBufLen > 0) { /* read from backup buffer */
         if (leftLen <= s->readBufLen) {
-            memcpy(mediaBuf, s->readBuf + s->readBufOff, leftLen);
+            memcpy(mediaBuf + readBytes, s->readBuf + s->readBufOff, leftLen);
             s->readBufOff += leftLen;
             s->readBufLen -= leftLen;
             readBytes += leftLen;
             leftLen = 0;
         } else {
-            memcpy(mediaBuf, s->readBuf + s->readBufOff, s->readBufLen);
+            memcpy(mediaBuf + readBytes, s->readBuf + s->readBufOff, s->readBufLen);
             s->readBufOff += s->readBufLen;
             leftLen -= s->readBufLen;
             readBytes += s->readBufLen;