Switch placeholder app in test to another

I'm removing ApkVerityTestApp soon, so switch the placeholder app here
to another (instead of maintaining our own copy) from
frameworks/base/tests/FeatureSplit/.

Bug: 277916185
Test: atest BinaryTransparencyHostTest
Change-Id: Iac0a9bc52221f626fe0eeeadcfebc3ad96d356a3
diff --git a/tests/BinaryTransparencyHostTest/Android.bp b/tests/BinaryTransparencyHostTest/Android.bp
index dc6bdff..615990f 100644
--- a/tests/BinaryTransparencyHostTest/Android.bp
+++ b/tests/BinaryTransparencyHostTest/Android.bp
@@ -35,6 +35,8 @@
     data: [
         ":BinaryTransparencyTestApp",
         ":EasterEgg",
+        ":FeatureSplitBase",
+        ":FeatureSplit1",
         ":com.android.apex.cts.shim.v2_rebootless_prebuilt",
     ],
     test_suites: [