Add support for ADB server environment variables (#96)

* support ADB env vars for configuring the server connection

* update startADBServer to use common adb socket params

* use adbSocket config value to set adb host and port

* make sure env var values are trimmed

* pretty-print launch args and env vars

* use adb socket host for JDWP connections

* allow JDWP port to be fixed

* include the command detail in adb command failures

* configure adb socket and jdwp port parameters for attach configs

* bump version 1.3.0

README.md

@@ -49,9 +49,9 @@ The following settings are used to configure the debugger:
                 // Fully qualified path to the built APK (Android Application Package).
                 "apkFile": "${workspaceRoot}/app/build/outputs/apk/app-debug.apk",
 
-                // Port number to connect to the local ADB (Android Debug Bridge) instance.
-                // Default: 5037
-                "adbPort": 5037,
+                // `host:port` configuration for connecting to the ADB (Android Debug Bridge) server instance.
+                // Default: localhost:5037
+                "adbSocket": "localhost:5037",
 
                 // Automatically launch 'adb start-server' if not already started.
                 // Default: true