Add instructions on how to get logs via Android

Change-Id: Iaa123857a122cf3874496ab953ffd2b9ebf35df1

guides/how-to-report-bugs.md

@@ -206,6 +206,15 @@ Then copy the backtrace and paste it in the issue.
 
 #### On Android
 
+To gather logs via your phone using Jami itself:
+
++ Tap `Conversations`
++ Tap the three-dot menu on the top right
++ Tap `Settings`
++ Tap `Diagnostic logs`
+
+To gather logs via your computer using the Android Debug Bridge (adb):
+
 + You need to have adb setup on your computer.
 + Launch Jami on your smartphone and then execute
 + ```adb logcat *:D | grep `adb shell ps | egrep 'cx.ring' | cut -c10-15` > logring.txt```