Updated SessionKeystore constructor and factory method

app/src/main/java/io/elixxir/dapp/session/data/SessionKeyStore.kt

@@ -5,12 +5,12 @@ import android.security.keystore.KeyGenParameterSpec
 import android.security.keystore.KeyInfo
 import android.security.keystore.KeyProperties
 import bindings.Bindings
+import io.elixxir.dapp.DappSdk.Companion.defaultDispatcher
 import io.elixxir.dapp.preferences.KeyStorePreferences
 import io.elixxir.dapp.session.model.SessionPassword
 import io.elixxir.dapp.util.fromBase64toByteArray
 import io.elixxir.dapp.util.toBase64String
 import kotlinx.coroutines.CoroutineDispatcher
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import timber.log.Timber
 import java.security.*
@@ -35,11 +35,11 @@ class SecureHardwareException : Exception() {
 
 class DappSessionKeystore private constructor(
     private val preferences: KeyStorePreferences,
-    private val defaultDispatcher: CoroutineDispatcher = Dispatchers.IO
+    private val dispatcher: CoroutineDispatcher
 ) : SessionKeyStore {
 
     override suspend fun createSessionPassword(requireSecureHardware: Boolean): Result<Unit> =
-        withContext(defaultDispatcher) {
+        withContext(dispatcher) {
             if (requireSecureHardware && !isHardwareBackedKeyStore()) {
                 return@withContext Result.failure(SecureHardwareException())
             }
@@ -190,7 +190,7 @@ class DappSessionKeystore private constructor(
         IllegalBlockSizeException::class,
         BadPaddingException::class
     )
-    override suspend fun rsaDecryptPassword(): SessionPassword = withContext(defaultDispatcher) {
+    override suspend fun rsaDecryptPassword(): SessionPassword = withContext(dispatcher) {
         val encryptedBytes = preferences.userSecret.fromBase64toByteArray()
         val key = getPrivateKey()
         val cipher1 = Cipher.getInstance(KEYSTORE_ALGORITHM)
@@ -234,8 +234,11 @@ class DappSessionKeystore private constructor(
         )
         private const val PASSWORD_LENGTH = 64L
 
-        internal fun newInstance(
-            preferences: KeyStorePreferences,
-        ): DappSessionKeystore = DappSessionKeystore(preferences)
+        internal fun newInstance(preferences: KeyStorePreferences): DappSessionKeystore {
+            return DappSessionKeystore(
+                preferences,
+                defaultDispatcher
+            )
+        }
     }
 }
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