transcoding: add more dumps for jobs

bug: 154733526
test: run the following to monitor transcoding status:

watch -n 1 adb shell dumpsys media.transcoding

Change-Id: I167bae9adcff2f80b26aefb520b4ab6d493e3f9d
diff --git a/media/libmediatranscoding/TranscodingClientManager.cpp b/media/libmediatranscoding/TranscodingClientManager.cpp
index d9f3f28..3f79705 100644
--- a/media/libmediatranscoding/TranscodingClientManager.cpp
+++ b/media/libmediatranscoding/TranscodingClientManager.cpp
@@ -282,16 +282,16 @@
     char buffer[SIZE];
     std::scoped_lock lock{mLock};
 
-    snprintf(buffer, SIZE, "    Total num of Clients: %zu\n", mClientIdToClientMap.size());
-    result.append(buffer);
-
     if (mClientIdToClientMap.size() > 0) {
-        snprintf(buffer, SIZE, "========== Dumping all clients =========\n");
+        snprintf(buffer, SIZE, "\n========== Dumping all clients =========\n");
         result.append(buffer);
     }
 
+    snprintf(buffer, SIZE, "  Total num of Clients: %zu\n", mClientIdToClientMap.size());
+    result.append(buffer);
+
     for (const auto& iter : mClientIdToClientMap) {
-        snprintf(buffer, SIZE, "    -- Client id: %lld  name: %s\n", (long long)iter.first,
+        snprintf(buffer, SIZE, "    Client %lld:  pkg: %s\n", (long long)iter.first,
                  iter.second->mClientName.c_str());
         result.append(buffer);
     }