Add sdk version check before skipping telephony managers initialization

import android.annotation.NonNull;

import android.app.SystemServiceRegistry;

import android.compat.Compatibility;

import android.compat.annotation.ChangeId;

import android.compat.annotation.EnabledSince;

import android.content.Context;

import android.content.pm.PackageManager;

import android.os.Build;

import android.os.SystemProperties;

import android.os.TelephonyServiceManager;

import android.telephony.euicc.EuiccCardManager;

import android.telephony.euicc.EuiccManager;

    private TelephonyFrameworkInitializer() {

    }

    /**

     * Starting with {@link VANILLA_ICE_CREAM}, Telephony feature flags

     * (e.g. {@link PackageManager#FEATURE_TELEPHONY_SUBSCRIPTION}) are being checked before

     * returning managers that depend on them. If the feature is missing,

     * {@link Context#getSystemService} will return null.

     */

    @ChangeId

    @EnabledSince(targetSdkVersion = Build.VERSION_CODES.VANILLA_ICE_CREAM)

    static final long ENABLE_CHECKING_TELEPHONY_FEATURES = 330583731;

    private static volatile TelephonyServiceManager sTelephonyServiceManager;

    /**

        sTelephonyServiceManager = Preconditions.checkNotNull(telephonyServiceManager);

    }

    // Suppressing AndroidFrameworkCompatChange because we're querying vendor

    // partition SDK level, not application's target SDK version (which BTW we

    // also check through Compatibility framework a few lines below).

    @SuppressWarnings("AndroidFrameworkCompatChange")

    private static boolean hasSystemFeature(Context context, String feature) {

        // Check release status of this change in behavior.

        if (!Flags.minimalTelephonyManagersConditionalOnFeatures()) return true;

        // Check SDK version of the vendor partition.

        final int vendorApiLevel = SystemProperties.getInt(

                "ro.vendor.api_level", Build.VERSION.DEVICE_INITIAL_SDK_INT);

        if (vendorApiLevel < Build.VERSION_CODES.VANILLA_ICE_CREAM) return true;

        // Check SDK version of the client app.

        if (!Compatibility.isChangeEnabled(ENABLE_CHECKING_TELEPHONY_FEATURES)) return true;

        // Finally, check if the system feature is actually present.

        return context.getPackageManager().hasSystemFeature(feature);

    }