Common flicker assertions

Create a library for common wm flicker assertions, to be used by WM Shell and other tests, as needed

Test: m wm-flicker-common-assertions
Change-Id: I020d571b59047451ce31bf22adf8b7e4d4458721

tests/FlickerTests/Android.bp

@@ -54,4 +54,18 @@ android_test {
         "launcher-aosp-tapl",
         "platform-test-annotations",
     ],
+}
+
+java_library {
+    name: "wm-flicker-common-assertions",
+    platform_apis: true,
+    srcs: ["src/**/*Assertions.java", "src/**/*Assertions.kt"],
+    exclude_srcs: [
+        "**/helpers/*",
+    ],
+    static_libs: [
+        "flickerlib",
+        "truth-prebuilt",
+        "app-helpers-core"
+    ],
 }