fastboot, cmd, bugreport, bugreportz: update all "more information" links (#11134)

pages/android/bugreport.md

@@ -2,7 +2,7 @@
 
 > Show an Android bug report.
 > This command can only be used through `adb shell`.
-> More information: <https://cs.android.com/android/platform/superproject/+/master:frameworks/native/cmds/bugreport>.
+> More information: <https://cs.android.com/android/platform/superproject/+/main:frameworks/native/cmds/bugreport>.
 
 - Display a complete bug report of an Android device:
 

pages/android/bugreportz.md

@@ -2,7 +2,7 @@
 
 > Generate a zipped Android bug report.
 > This command can only be used through `adb shell`.
-> More information: <https://cs.android.com/android/platform/superproject/+/master:frameworks/native/cmds/bugreportz>.
+> More information: <https://cs.android.com/android/platform/superproject/+/main:frameworks/native/cmds/bugreportz>.
 
 - Generate a complete zipped bug report of an Android device:
 

pages/android/cmd.md

@@ -1,7 +1,7 @@
 # cmd
 
 > Android service manager.
-> More information: <https://cs.android.com/android/platform/superproject/+/master:frameworks/native/cmds/cmd/>.
+> More information: <https://cs.android.com/android/platform/superproject/+/main:frameworks/native/cmds/cmd/>.
 
 - [l]ist all running services:
 

pages/common/fastboot.md

@@ -1,7 +1,7 @@
 # fastboot
 
 > Communicate with connected Android devices when in bootloader mode (the one place `adb` doesn't work).
-> More information: <https://cs.android.com/android/platform/superproject/+/master:system/core/fastboot>.
+> More information: <https://cs.android.com/android/platform/superproject/+/main:system/core/fastboot>.
 
 - Unlock the bootloader: