Update AppComponentFactory.instantiateClassLoader docs

Clarify the intended use and properties of the default class loader.

Bug: 128524313
Test: n/a
Merged-In: Iae82554f9294d5248b98f1fa72fc1a47993e86fd
Change-Id: Iae82554f9294d5248b98f1fa72fc1a47993e86fd
(cherry picked from commit 59a97141c8ad3e3d9d3d5c4db1f59d4c9847177c)
1 file changed