Unroll array_map in ResourceLoaderFileModule::readStyleFiles

ResourceLoaderFileModule::readStyleFile can throw exceptions which
produces warnings when using array_map.

Produces useful stacktraces when there are issues with style file like LESS compilation errors

Bug: 47844
Bug: 59858
Change-Id: I7c48b2c94752eee81f0eeb8e00d1f2b526d80dfc
Merge "Unroll array_map in ResourceLoaderFileModule::readStyleFiles"