Export last few lines of the logs

Summary:
This diff exports the last 30 mins of logs. I noticed that the export can become massive, if Flipper is running for a long time and if all the logs are exported. Due to this I have noticed that the byte size of the exports has been huge and most probably causing out of emory exception in our end point to upload the trace.

Just exporting Logs plugin, size of Flipper trace is 1.8MB, mind that my Flipper was just open for few mins.

{F233265050}

Look at [this](https://our.intern.facebook.com/intern/scuba/query/?dataset=infinity_analytics_events&drillstate=%7B%22sampleCols%22%3A[%22infinity_version%22%2C%22session_id%22%2C%22data%22%2C%22time%22%2C%22is_headless%22%2C%22platform%22%2C%22plugin%22%2C%22namespace_version%22%2C%22arch%22%2C%22gatekeepers%22%2C%22fbid%22%2C%22event%22%2C%22type%22%2C%22namespace%22%2C%22electron_version%22%2C%22node_version%22]%2C%22cols%22%3A[%22fbid%22]%2C%22derivedCols%22%3A[]%2C%22mappedCols%22%3A[]%2C%22enumCols%22%3A[]%2C%22return_remainder%22%3Afalse%2C%22should_pivot%22%3Afalse%2C%22is_timeseries%22%3Afalse%2C%22hideEmptyColumns%22%3Afalse%2C%22start%22%3A%22-1%20week%22%2C%22samplingRatio%22%3A1%2C%22compare%22%3A%22none%22%2C%22should_transpose%22%3Afalse%2C%22dimensions%22%3A[%22event%22]%2C%22num_samples%22%3A%22100%22%2C%22metric%22%3A%22count%22%2C%22top%22%3A50%2C%22timezone%22%3A%22America%2FLos_Angeles%22%2C%22end%22%3A%22now%22%2C%22aggregateList%22%3A[]%2C%22param_dimensions%22%3A[]%2C%22modifiers%22%3A[]%2C%22order%22%3A%22none%22%2C%22order_desc%22%3Atrue%2C%22filterMode%22%3A%22DEFAULT%22%2C%22constraints%22%3A[[%7B%22column%22%3A%22type%22%2C%22op%22%3A%22eq%22%2C%22value%22%3A[%22[%5C%22usage%5C%22]%22]%7D%2C%7B%22column%22%3A%22fbid%22%2C%22op%22%3A%22eq%22%2C%22value%22%3A[%22[%5C%22100001214797081%5C%22]%22]%7D%2C%7B%22column%22%3A%22event%22%2C%22op%22%3A%22eq%22%2C%22value%22%3A[%22[%5C%22export-url%3Atrace-size%5C%22]%22]%7D]]%2C%22c_constraints%22%3A[[]]%2C%22b_constraints%22%3A[[]]%2C%22metrik_view_params%22%3A%7B%22should_use_legacy_colors%22%3Afalse%2C%22columns_skip_formatting%22%3A[]%2C%22view%22%3A%22samples_client%22%2C%22width%22%3A%222110%22%2C%22height%22%3A%221300%22%2C%22tableID%22%3A%22infinity_analytics_events%22%2C%22tooltip_outside%22%3Atrue%2C%22fitToContent%22%3Afalse%2C%22format_tooltip_in_percent%22%3Afalse%2C%22pocs%22%3A[%7B%22poc_label%22%3A%22Point%20of%20contact%22%2C%22poc_id%22%3A%22100002006986037%22%7D]%2C%22state%22%3A%22published%22%2C%22use_y_axis_hints_as_limits%22%3Atrue%2C%22has_dynamic_context_menu%22%3Atrue%2C%22has_context_menu%22%3Afalse%2C%22legend_mode%22%3A%22nongrid%22%2C%22title%22%3A%22Support%20Form%20V2%20Events%22%2C%22timezone_offset%22%3A420%2C%22y_min_hint%22%3A0%2C%22should_render_plugins_menu%22%3Afalse%2C%22title_use_v2%22%3Atrue%7D%7D&pool=uber&view=samples_client&dashboard_id&tab_id&widget_id&widget_piece_id), the size of the export is 194 MB.

Reviewed By: jknoxville

Differential Revision: D20868701

fbshipit-source-id: 1f041d11fc9cab93cdd1f1a28f15fa557b51fc75

desktop/app/src/devices/BaseDevice.tsx

@@ -134,8 +134,12 @@ export default class BaseDevice {
     this._notifyLogListeners(entry);
   }
 
-  getLogs() {
-    return this.logEntries;
+  getLogs(startDate: Date | null = null) {
+    return startDate != null
+      ? this.logEntries.filter((log) => {
+          return log.date > startDate;
+        })
+      : this.logEntries;
   }
 
   clearLogs(): Promise<void> {

desktop/app/src/utils/exportData.tsx

@@ -294,7 +294,11 @@ const addSaltToDeviceSerial = async (
     deviceType: device.deviceType,
     title: device.title,
     os: device.os,
-    logEntries: selectedPlugins.includes('DeviceLogs') ? device.getLogs() : [],
+    logEntries: selectedPlugins.includes('DeviceLogs')
+      ? device.getLogs(
+          new Date(new Date().getTime() - 1000 * 60 * 10), // Last 10 mins of logs
+        )
+      : [],
     screenshotHandle: deviceScreenshot,
   });
   statusUpdate &&