breeze: ImsInit: Toggle airplane mode in ImsInit

* Doing this in an initscript is weird, and makes it a pain in the ass to address denials from it on Enforcing.
* Convert the code into Java, and do it in the ImsInit app instead.

Co-authored-by: R0rt1z2 <rogerortizleal@gmail.com>
Signed-off-by: bengris32 <bengris32@protonmail.ch>
Signed-off-by: techyminati <sinha.aryan03@gmail.com>
Change-Id: I6042eb476b1b227d7d1f82c2f2bbd9433891cb4b

ImsInit/AndroidManifest.xml

@@ -18,5 +18,6 @@
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS"/>
     <uses-permission android:name="android.permission.DIAGNOSTIC"/>
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+
 </manifest>

ImsInit/src/org/lineageos/umidigi/imsinit/BootCompletedReceiver.java

@@ -4,6 +4,8 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.provider.Settings;
+import android.os.UserHandle;
 import android.util.Log;
 
 import com.android.ims.ImsManager;
@@ -27,6 +29,35 @@ public class BootCompletedReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(final Context context, Intent intent) {
         Log.i(LOG_TAG, "onBoot");
+
+        /* Toggle airplane mode on and off at boot to enable VoLTE. */
+        Log.i(LOG_TAG, "Trying to toggle airplane mode to enable VoLTE");
+        new Thread(() -> {
+            Intent tIntent;
+
+            try {
+                Thread.sleep(2000);
+            } catch (Exception e) {}
+
+            tIntent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
+            tIntent.putExtra("state", true);
+            Settings.Global.putInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 1);
+            context.sendBroadcastAsUser(tIntent, UserHandle.ALL);
+
+            /*
+             * Sleep for a second before toggling airplane mode
+             * off. Without this, airplane mode can sometimes
+             * fail to be toggled off again.
+             */
+            try {
+                Thread.sleep(1000);
+            } catch (Exception e) {}
+
+            tIntent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
+            tIntent.putExtra("state", false);
+            Settings.Global.putInt(context.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 0);
+            context.sendBroadcastAsUser(tIntent, UserHandle.ALL);
+        }).start();
 
         context.startService(new Intent(context, PhoneStateService.class));
     }

configs/permissions/privapp-permissions-org.lineageos.umidigi.imsinit.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<permissions>
+    <privapp-permissions package="org.lineageos.umidigi.imsinit">
+        <permission name="android.permission.INTERACT_ACROSS_USERS"/>
+        <permission name="android.permission.WRITE_SECURE_SETTINGS"/>
+    </privapp-permissions>
+</permissions>

device.mk

@@ -85,7 +85,8 @@ PRODUCT_PACKAGES += \
     ImsInit
 
 PRODUCT_COPY_FILES += \
-    $(LOCAL_PATH)/configs/permissions/privapp-permissions-mediatek.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/permissions/privapp-permissions-mediatek.xml
+    $(LOCAL_PATH)/configs/permissions/privapp-permissions-mediatek.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/permissions/privapp-permissions-mediatek.xml \
+    $(LOCAL_PATH)/configs/permissions/privapp-permissions-org.lineageos.umidigi.imsinit.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/permissions/privapp-permissions-org.lineageos.umidigi.imsinit.xml
 
 # Keylayout
 PRODUCT_COPY_FILES += \