Merge changes from topic 'am-7c32574535fe4d59a550a86c30095868'

* changes:
  Merge changes Ia1f2535c,I9ca93f31,If5b53f6f,I119e0bfc am: 98d86fe2 am: c6d9f0fb am: 367f70cc am: 6c852fb2
  Dynamically add the webview_zygote's preloaded APK to the zygote FD whitelist. am: 54e387dd am: 839a185b am: df781cc5 am: 15fe7384
  Split core/jni/fd_utils-inl.h into a .h/.cpp pair. am: 8225b7c9 am: 63a7fe6d am: 02479371 am: 4a27be19  -s ours
  Zygote: Additional whitelisting for legacy devices. am: f701ba36 am: 7a694067 am: 647986fd am: e34b213b