Disable caches for perf tests

Bug: 140788621
Test: atest PackageManagerPerfTest
Change-Id: Idba8ea4c53ceacd9e07a06717c44d5411aef45d8

apct-tests/perftests/packagemanager/src/android/os/PackageManagerPerfTest.java

@@ -31,6 +31,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
 import androidx.test.platform.app.InstrumentationRegistry;
 
+import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -58,6 +59,12 @@ public class PackageManagerPerfTest {
         final Context context = InstrumentationRegistry.getInstrumentation().getContext();
     }
 
+    @Before
+    public void setup() {
+        PackageManager.disableApplicationInfoCache();
+        PackageManager.disablePackageInfoCache();
+    }
+
     @Test
     @DisableCompatChanges(PackageManager.FILTER_APPLICATION_QUERY)
     public void testCheckPermissionExists() {