installApk static method
for Android : install apk by its file absolute path;
if the target platform is higher than android 24:
a appId
is required
(the caller's applicationId which is defined in build.gradle)
Implementation
static Future<String?> installApk(String filePath, String appId) async {
Map<String, String> params = {'filePath': filePath, 'appId': appId};
return await _channel.invokeMethod('installApk', params);
}