Moving all sources that are shared between Launcher and TAPL in one directory

This will help SysUI test team (who uses TAPL) to set up Gradle build for their tests.

Bug: 202567877, 234414088
Test: presubmit
Change-Id: I3d923ea4b54d1a4c3d2b345be09692727d30433e
diff --git a/Android.bp b/Android.bp
index 4adbf53..330c32e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -35,9 +35,7 @@
     ],
     srcs: [
         "tests/tapl/**/*.java",
-        "src/com/android/launcher3/ResourceUtils.java",
-        "src/com/android/launcher3/testing/TestProtocol.java",
-        "src/com/android/launcher3/testing/*Request.java",
+        "src/com/android/launcher3/testing/shared/**/*.java",
     ],
     resource_dirs: [ ],
     manifest: "tests/tapl/AndroidManifest.xml",