Support physical device logging

Summary:
Changelog: Logs plugin now supports physical iOS devices

As reported in https://github.com/facebook/flipper/issues/262 and linked papercut.

This diff adds support for iOS device logs through idb. Since idb doesn't respect `--json` flag at the moment, we perform the parsing in Flipper itself.

Reviewed By: passy

Differential Revision: D27346262

fbshipit-source-id: 3b314716f48bb9a7fe709370303396a51893359c

desktop/plugins/logs/index.tsx

@@ -35,7 +35,7 @@ export type ExtendedLogEntry = DeviceLogEntry & {
 };
 
 function createColumnConfig(
-  os: 'iOS' | 'Android' | 'Metro',
+  _os: 'iOS' | 'Android' | 'Metro',
 ): DataTableColumn<ExtendedLogEntry>[] {
   return [
     {
@@ -74,7 +74,7 @@ function createColumnConfig(
       key: 'pid',
       title: 'PID',
       width: 60,
-      visible: os === 'Android',
+      visible: true,
     },
     {
       key: 'tid',