CCodec: FrameReassembler to accept 0-size frames

0-sized EOS frame is used to signal EOS and drain the data.

Bug: 193885332
Test: atest ccodec_unit_test
Change-Id: Iabd262d1c68e0f29ce8019f57967de1ad6009c77
diff --git a/media/codec2/sfplugin/FrameReassembler.cpp b/media/codec2/sfplugin/FrameReassembler.cpp
index cf1be17..b52506c 100644
--- a/media/codec2/sfplugin/FrameReassembler.cpp
+++ b/media/codec2/sfplugin/FrameReassembler.cpp
@@ -88,8 +88,7 @@
         const sp<MediaCodecBuffer> &buffer,
         std::list<std::unique_ptr<C2Work>> *items) {
     int64_t timeUs;
-    if (buffer->size() == 0u
-            || !buffer->meta()->findInt64("timeUs", &timeUs)) {
+    if (!buffer->meta()->findInt64("timeUs", &timeUs)) {
         return C2_BAD_VALUE;
     }