docs: Update help button redirects for new Android Monitor docs

- from: /r/studio-ui/am-network.html

  to: /tools/help/am-network.html

- from: /r/studio-ui/am-hprof.html

  to: /tools/help/am-memory.html

  to: /tools/help/am-hprof.html

- from: /r/studio-ui/am-allocation.html

  to: /tools/help/am-memory.html

  to: /tools/help/am-allocation.html

- from: /r/studio-ui/am-methodtrace.html

  to: /tools/help/am-cpu.html

  to: /tools/help/am-methodtrace.html

- from: /r/studio-ui/am-sysinfo.html

  to: /tools/help/android-monitor.html

  to: /tools/help/am-sysinfo.html

- from: /r/studio-ui/am-screenshot.html

  to: /tools/help/android-monitor.html

  to: /tools/help/am-screenshot.html

- from: /r/studio-ui/am-video.html

  to: /tools/help/android-monitor.html

  to: /tools/help/am-video.html

- from: /r/studio-ui/avd-manager.html

  to: /tools/help/avd-manager.html

  to: /tools/devices/managing-avds.html

- from: /r/studio-ui/rundebugconfig.html

  to: /tools/devices/emulator.html

- from: /r/studio-ui/devicechooser.html