Opt: Auto-select the fastest screenshot method

module/device/connection.py

@@ -215,6 +215,30 @@ class Connection(ConnectionAttr):
             # str
             return result
 
+    @cached_property
+    def cpu_abi(self) -> str:
+        """
+        Returns:
+            str: arm64-v8a, armeabi-v7a, x86, x86_64
+        """
+        abi = self.adb_shell(['getprop', 'ro.product.cpu.abi']).strip()
+        if not len(abi):
+            logger.error(f'CPU ABI invalid: "{abi}"')
+        return abi
+
+    @cached_property
+    def sdk_ver(self) -> int:
+        """
+        Android SDK/API levels, see https://apilevels.com/
+        """
+        sdk = self.adb_shell(['getprop', 'ro.build.version.sdk']).strip()
+        try:
+            return int(sdk)
+        except ValueError:
+            logger.error(f'SDK version invalid: {sdk}')
+
+        return 0
+
     @cached_property
     def is_avd(self):
         if get_serial_pair(self.serial)[0] is None:
@@ -294,8 +318,7 @@ class Connection(ConnectionAttr):
         Returns:
             list[str]: ['nc'] or ['busybox', 'nc']
         """
-        sdk = self.adb_shell(['getprop', 'ro.build.version.sdk'])
-        sdk = int(sdk)
+        sdk = self.sdk_ver
         logger.info(f'sdk_ver: {sdk}')
         if sdk >= 28:
             # Android 9 emulators does not have `nc`, try `busybox nc`