Move Launcher classes shared between tests and prod in a separate lib

This is necessary because otherwise those are included in several gradle projects. Gradle doesn't support the same files imported in different projects, and it removes them from a random one if it happens, resulting in missing symbols.

This extracts the shared files in a new target, and adds it as dep of the original target.

Test: Build launcher + execute a few tests manually with gradle + verify that Launcher.java can resolve all symbols with gradle config
Bug: 262267728
Change-Id: Ida5b25c45320d517603834112f4699e4d3344c03
diff --git a/tests/Android.bp b/tests/Android.bp
index 39bd307..7144d65 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -117,3 +117,15 @@
     test_config: "Launcher3Tests.xml",
     data: [":Launcher3"]
 }
+
+// Shared between tests and launcher
+android_library {
+    name: "launcher-testing-shared",
+    srcs: [
+        "shared/com/android/launcher3/testing/shared/**/*.java"
+    ],
+    resource_dirs: [ ],
+    manifest: "shared/AndroidManifest.xml",
+    sdk_version: "current",
+    min_sdk_version: min_launcher3_sdk_version,
+ }
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