Disable UserCallActivity splash animation

UserCallActivity should be a transparent activity with no animation.

Flag: NONE simple UI fix
Test: Manual test both on phone and watch by triggering a call action
Bug: 353963550
Change-Id: I2f426b43d39c027015c728e887c6d04c1322fcac
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 941bd5e..08521a5 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -137,7 +137,7 @@
                          contacts provider entries. Any data not fitting the schema described is ignored. -->
         <activity android:name=".components.UserCallActivity"
              android:label="@string/userCallActivityLabel"
-             android:theme="@style/Theme.Telecomm.Transparent"
+             android:theme="@style/Theme.Telecomm.UserCallActivityNoSplash"
              android:permission="android.permission.CALL_PHONE"
              android:excludeFromRecents="true"
              android:process=":ui"
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 0624082..0660fd5 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -26,6 +26,18 @@
         <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
     </style>
 
+    <style name="Theme.Telecomm.UserCallActivityNoSplash" parent="@android:style/Theme.DeviceDefault.Light">
+        <item name="android:forceDarkAllowed">true</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
+        <item name="android:windowDisablePreview">true</item>
+    </style>
+
    <style name="Theme.Telecom.DialerSettings" parent="@android:style/Theme.DeviceDefault.Light">
         <item name="android:forceDarkAllowed">true</item>
         <item name="android:actionBarStyle">@style/TelecomDialerSettingsActionBarStyle</item>