Allow tablet/tv product variants override PackageInstaller

The PackageInstaller is in base_system.mk which is inherited by TV.
PackageInstaller_tv should overide it to avoid dual apps to be
installed.

Bug: 258572488
Test: make a TV device, check aritifacts, boot up.
Change-Id: I6b330fd9a908a75f033248872cc4a55843d97871

packages/PackageInstaller/Android.bp

@@ -58,6 +58,7 @@ android_app {
     privileged: true,
     platform_apis: true,
     rename_resources_package: false,
+    overrides: ["PackageInstaller"],
 
     static_libs: [
         "xz-java",
@@ -76,6 +77,7 @@ android_app {
     privileged: true,
     platform_apis: true,
     rename_resources_package: false,
+    overrides: ["PackageInstaller"],
 
     static_libs: [
         "xz-java",