9847 Started adding the engine hash to frameworks’ Info.plist.

9849 Preserve the alpha for VD content by setting a transparent background.

9850 Add multi-line flag to semantics

9851 Add a macro for prefixing embedder.h symbols

9855 Fix missing assignment to _allowHeadlessExecution

9859 Fix justify for RTL paragraphs.

9867 Fixed error in generated xml Info.plist.

9873 Add clang version to Info.plist

9875 Simplify buildtools

9890 Log dlopen errors only in debug mode

9893 Removed logic from FlutterAppDelegate into FlutterPluginAppLifeCycleDelegate

9894 Add the isMultiline semantics flag to values