Revert "manifest: reset PackageInstaller to 6.0.1-r20 for now"

This reverts commit 7aafc83c3cc0ff8babca2f15f58787fc5c838176.

Change-Id: I3383fc05c64d4130a7ae8b5a5a29598a85664a9f

default.xml

@@ -378,7 +378,7 @@
   <project path="packages/apps/OmniSwitch" name="android_packages_apps_OmniSwitch" remote="omnirom" revision="android-6.0" />
   <project path="packages/apps/OneTimeInitializer" name="platform/packages/apps/OneTimeInitializer" />
   <project path="packages/apps/OpenDelta" name="android_packages_apps_OpenDelta" remote="omnirom" revision="android-6.0" />
-  <project path="packages/apps/PackageInstaller" name="android_packages_apps_PackageInstaller" remote="omnirom" revision="android-6.0.1_r20" />
+  <project path="packages/apps/PackageInstaller" name="android_packages_apps_PackageInstaller" remote="omnirom" revision="android-6.0" />
   <project path="packages/apps/PerformanceControl" name="android_packages_apps_PerformanceControl" remote="omnirom" revision="android-6.0" />
   <project path="packages/apps/Phone" name="platform/packages/apps/Phone" groups="pdk-fs" />
   <project path="packages/apps/PhoneCommon" name="platform/packages/apps/PhoneCommon" />