Use Android fonts as they are for layoutlib native

Layoutlib native can handle fonts as the Android framework does. So
simply copy the Android fonts for layoutlib.

Exempt-From-Owner-Approval: experimental branch
Bug: 143073883
Test: layoutlib tests
Change-Id: Ida2e081d1b0737c70ea8621b23b5f0e729d5df35
Merged-In: Ida2e081d1b0737c70ea8621b23b5f0e729d5df35