Add preferences for AirPods Identity and Encryption Keys

This commit introduces settings for users to input their AirPods' Identity Resolving Key (IRK) and Encryption Key. These keys, obtainable via a MacBook, allow CAPod to reliably identify the AirPods and decrypt detailed status information.

Key changes:
- Added new preferences in General Settings for IRK and Encryption Key.
- Implemented a custom dialog for key input, including validation and a link to a guide.
- Added a Moshi adapter for serializing/deserializing `ByteArray` to/from Base64 for storing the keys.
- Included new string resources for labels, descriptions, and explanations related to the keys.
- Added new icons for the key preferences.

app-common/src/main/java/eu/darken/capod/common/WebpageTool.kt

@@ -2,7 +2,7 @@ package eu.darken.capod.common
 
 import android.content.Context
 import android.content.Intent
-import android.net.Uri
+import androidx.core.net.toUri
 import dagger.Reusable
 import dagger.hilt.android.qualifiers.ApplicationContext
 import eu.darken.capod.common.debug.logging.Logging.Priority.ERROR
@@ -15,7 +15,7 @@ class WebpageTool @Inject constructor(
 ) {
 
     fun open(address: String) {
-        val intent = Intent(Intent.ACTION_VIEW, Uri.parse(address)).apply {
+        val intent = Intent(Intent.ACTION_VIEW, address.toUri()).apply {
             addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
         }
         try {

app-common/src/main/java/eu/darken/capod/common/serialization/ByteArrayAdapter.kt

@@ -0,0 +1,15 @@
+package eu.darken.capod.common.serialization
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.ToJson
+import kotlin.io.encoding.Base64
+import kotlin.io.encoding.ExperimentalEncodingApi
+
+@OptIn(ExperimentalEncodingApi::class)
+class ByteArrayAdapter {
+    @ToJson
+    fun toJson(obj: ByteArray): String = Base64.encode(obj)
+
+    @FromJson
+    fun fromJson(base64: String): ByteArray? = Base64.decode(base64)
+}

app-common/src/main/java/eu/darken/capod/common/serialization/SerializationModule.kt

@@ -15,6 +15,7 @@ class SerializationModule {
     @Singleton
     fun moshi(): Moshi = Moshi.Builder()
         .add(JavaInstantAdapter())
+        .add(ByteArrayAdapter())
         .build()
 
 }

app-common/src/main/java/eu/darken/capod/main/core/GeneralSettings.kt

@@ -35,6 +35,9 @@ class GeneralSettings @Inject constructor(
 
     val mainDeviceAddress = preferences.createFlowPreference<String?>("core.maindevice.address", null)
     val mainDeviceModel = preferences.createFlowPreference("core.maindevice.model", PodDevice.Model.UNKNOWN, moshi)
+    val mainDeviceIdentityKey = preferences.createFlowPreference<ByteArray?>("core.maindevice.identitykey", null, moshi)
+    val mainDeviceEncryptionKey =
+        preferences.createFlowPreference<ByteArray?>("core.maindevice.encryptionkey", null, moshi)
 
     val isOffloadedFilteringDisabled = preferences.createFlowPreference(
         "core.compat.offloaded.filtering.disabled",