emulator: add page (#4326)

pages/common/adb-install.md

@@ -1,4 +1,4 @@
-# adb-install
+# adb install
 
 > Android Debug Bridge Install: Push packages to an Android emulator instance or connected Android devices.
 > More information: <https://developer.android.com/studio/command-line/adb>.

pages/common/emulator.md

@@ -0,0 +1,36 @@
+# emulator
+
+> Manager Android emulators from the command line.
+> More information: <https://developer.android.com/studio/run/emulator-commandline>.
+
+- Display the help:
+
+`emulator -help`
+
+- Start an Android emulator device:
+
+`emulator -avd {{name}}`
+
+- Display the webcams on your development computer that are available for emulation:
+
+`emulator -avd {{name}} -webcam-list`
+
+- Start an emulator overriding the facing back camera setting (use `-camera-front` for front camera):
+
+`emulator -avd {{name}} -camera-back {{none|emulated|webcamN}}`
+
+- Start an emulator, with a maximun network speed:
+
+`emulator -avd {{name}} -netspeed {{gsm|hscsd|gprs|edge|hsdpa|lte|evdo|full}}`
+
+- Start an emulator with network latency:
+
+`emulator -avd {{name}} -netdelay {{gsm|hscsd|gprs|edge|hsdpa|lte|evdo|none}}`
+
+- Start an emulator, making all TCP connections through a specified HTTP/HTTPS proxy (port number is required):
+
+`emulator -avd {{name}} -http-proxy {{http://example.com:80}}`
+
+- Start an emulator with a given SD card partition image file:
+
+`emulator -avd {{name}} -sdcard {{path/to/sdcard.img}}`