Modify PackageManagerPerfTest to work by itself agian

This change modifies PackageManagerPerfTest to work in isolation while
we work through an alternative per b/150624323

Test: atest PackageManagerPerfTest
Bug: 150624323
Change-Id: Iac1e040d4463e0e9609d1a7a6d88c9431bef2926
diff --git a/apct-tests/perftests/packagemanager/src/android/os/PackageManagerPerfTest.java b/apct-tests/perftests/packagemanager/src/android/os/PackageManagerPerfTest.java
index 761e930..673c6a3 100644
--- a/apct-tests/perftests/packagemanager/src/android/os/PackageManagerPerfTest.java
+++ b/apct-tests/perftests/packagemanager/src/android/os/PackageManagerPerfTest.java
@@ -43,9 +43,8 @@
             "com.android.perftests.packagemanager.TestPermission";
     private static final String PERMISSION_NAME_DOESNT_EXIST =
             "com.android.perftests.packagemanager.TestBadPermission";
-    private static final String OTHER_PACKAGE_NAME = "com.android.perftests.appenumeration0";
     private static final ComponentName TEST_ACTIVITY =
-            new ComponentName(OTHER_PACKAGE_NAME,
+            new ComponentName("com.android.perftests.packagemanager",
                     "android.perftests.utils.PerfTestActivity");
 
     @Rule
@@ -130,7 +129,7 @@
                 InstrumentationRegistry.getInstrumentation().getTargetContext().getPackageManager();
 
         while (state.keepRunning()) {
-            pm.getPackageInfo(OTHER_PACKAGE_NAME, 0);
+            pm.getPackageInfo(TEST_ACTIVITY.getPackageName(), 0);
         }
     }
 
@@ -148,7 +147,7 @@
                 InstrumentationRegistry.getInstrumentation().getTargetContext().getPackageManager();
 
         while (state.keepRunning()) {
-            pm.getApplicationInfo(OTHER_PACKAGE_NAME, 0);
+            pm.getApplicationInfo(TEST_ACTIVITY.getPackageName(), 0);
         }
     }