Fix WelcomeAnimation in testing (#1668)

- These changes also improve the UX of the app launch, as it only waits for the animation duration.

ui-lib/src/main/java/co/electriccoin/zcash/ui/MainActivity.kt

@@ -259,7 +259,7 @@ class MainActivity : FragmentActivity() {
                     onSuccess = {
                         lifecycleScope.launch {
                             // Wait until the welcome animation finishes, then mark it as presented to the user
-                            delay((AnimationConstants.together()).milliseconds)
+                            delay((AnimationConstants.durationOnly()).milliseconds)
                             authenticationViewModel.appAccessAuthentication.value = AuthenticationUIState.Successful
                         }
                     },

ui-lib/src/main/java/co/electriccoin/zcash/ui/screen/authentication/view/AuthenticationView.kt

@@ -8,6 +8,7 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.tooling.preview.Preview
@@ -16,6 +17,7 @@ import co.electriccoin.zcash.ui.common.viewmodel.AuthenticationResult
 import co.electriccoin.zcash.ui.design.component.AppAlertDialog
 import co.electriccoin.zcash.ui.design.component.BlankSurface
 import co.electriccoin.zcash.ui.design.theme.ZcashTheme
+import co.electriccoin.zcash.ui.screen.authentication.view.AnimationConstants.WELCOME_ANIM_TEST_TAG
 
 @Preview("App Access Authentication")
 @Composable
@@ -72,7 +74,7 @@ fun AppAccessAuthentication(
         animationState = welcomeAnimVisibility,
         onRetry = onRetry,
         showAuthLogo = showAuthLogo,
-        modifier = modifier,
+        modifier = modifier.testTag(WELCOME_ANIM_TEST_TAG),
     )
 }
 

ui-lib/src/main/java/co/electriccoin/zcash/ui/screen/authentication/view/WelcomeAnimation.kt

@@ -57,6 +57,8 @@ object AnimationConstants {
     const val WELCOME_ANIM_TEST_TAG = "WELCOME_ANIM_TEST_TAG"
 
     fun together() = (ANIMATION_DURATION + INITIAL_DELAY).toLong()
+
+    fun durationOnly() = (ANIMATION_DURATION).toLong()
 }
 
 // TODO [#1002]: Welcome screen animation masking