Fix property view for non flicker traces in winscope

There are 2 types of object whose properties can appear in the property
list: Flicker objects (WM/SF traces) and dictionaries
(IME/Accessibilty/Transactions).

While flicker objects have their properties directly in the main object,
those created by a call to the transform function have their properties
inside an obj property.

This CL makes flicker support both implementations

Bug: 167521734
Bug: 209452852
Test: run winscope and collect a transactions trace
Change-Id: I7103ef078cf62331fd45c45fd238173232993f47
1 file changed