[PS-1312] Migration to android12 and new splashscreen (#2063)

* [PS-1312] Updated Android Target and Framework to Android12 and updated new SplashScreen for Android12

* PS-1312 Changed PendingIntents mutability

* PS-1312 Removed unused imports

* PS-1312 Added method to helper to add mutability option according to Android version

* PS-1312 Renamed helper method AddPendingIntentMutability and fixed validation

* PS-1312 Improved PendingIntentMutability method from helper readability and naming

src/Android/Tiles/AutofillTileService.cs

@@ -12,7 +12,7 @@ using Java.Lang;
 namespace Bit.Droid.Tile
 {
     [Service(Permission = Manifest.Permission.BindQuickSettingsTile, Label = "@string/AutoFillTile",
-        Icon = "@drawable/shield")]
+        Icon = "@drawable/shield", Exported = true)]
     [IntentFilter(new string[] { ActionQsTile })]
     [Register("com.x8bit.bitwarden.AutofillTileService")]
     public class AutofillTileService : TileService

src/Android/Tiles/GeneratorTileService.cs

@@ -14,7 +14,7 @@ using Java.Lang;
 
 namespace Bit.Droid.Tile
 {
-    [Service(Permission = Android.Manifest.Permission.BindQuickSettingsTile, Label = "@string/PasswordGenerator",
+    [Service(Permission = Android.Manifest.Permission.BindQuickSettingsTile, Exported = true, Label = "@string/PasswordGenerator",
         Icon = "@drawable/generate")]
     [IntentFilter(new string[] { ActionQsTile })]
     [Register("com.x8bit.bitwarden.GeneratorTileService")]

src/Android/Tiles/MyVaultTileService.cs

@@ -15,7 +15,8 @@ using Java.Lang;
 namespace Bit.Droid.Tile
 {
     [Service(Permission = Android.Manifest.Permission.BindQuickSettingsTile, Label = "@string/MyVault",
-        Icon = "@drawable/shield")]
+        Icon = "@drawable/shield",
+        Exported = true)]
     [IntentFilter(new string[] { ActionQsTile })]
     [Register("com.x8bit.bitwarden.MyVaultTileService")]
     public class MyVaultTileService : TileService