Grant permissions for Android application

build.gradle

android.applicationVariants.all { variant ->
    // Create tasks for granting permissions
    def applicationId = variant.applicationId
    def variantName = variant.name.capitalize()
    def grantPermissionTask = tasks.create("grant${variantName}Permissions") << {
        "${adb} devices".execute().text.eachLine {
            if (it.endsWith("device")) {
                def device = it.split()[0]
                println "Granting permissions on devices ${device}"
                def permissions = ['SET_ANIMATION_SCALE',
                                   'CAMERA',
                                   'ACCESS_COARSE_LOCATION',
                                   'ACCESS_FINE_LOCATION',
                                   'WRITE_EXTERNAL_STORAGE',
                                   'READ_EXTERNAL_STORAGE']
                permissions.each {
                    "${adb} -s ${device} shell pm grant ${applicationId} android.permission.${it}".execute()
                    println "  - granted ${it} permission"
                }
            }
        }
    }

    grantPermissionTask.description = "Grant permissions for Marshmallow devices"
    grantPermissionTask.group = "permissions"
    grantPermissionTask.dependsOn "install${variantName}"
}