dumpsys: add page (#5739)

pages/android/dumpsys.md

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+# dumpsys
+
+> Provide information about Android system services.
+> More information: <https://developer.android.com/studio/command-line/dumpsys>.
+
+- Get diagnostic output for all system services:
+
+`dumpsys`
+
+- Get diagnostic output for a specific system service:
+
+`dumpsys {{service}}`
+
+- List all services `dumpsys` can give information about:
+
+`dumpsys -l`
+
+- List service-specific arguments for a service:
+
+`dumpsys {{service}} -h`
+
+- Exclude a specific service from the diagnostic output:
+
+`dumpsys --skip {{service}}`
+
+- Specify a timeout period in seconds (defaults to 10s):
+
+`dumpsys -t {{seconds}}`