Have bit grant permissions to installed APKs.

Otherwise unit tests fail spectacularly when they don't get the
runtime permissions that they expect.

Bug: 63391323
Test: bit FrameworksServicesTests:com.android.server.NetworkPolicyManagerServiceTest
Change-Id: I5307e0456865387ac14178268f543e2007b97096
diff --git a/tools/bit/main.cpp b/tools/bit/main.cpp
index d056ba5..5fb84c8 100644
--- a/tools/bit/main.cpp
+++ b/tools/bit/main.cpp
@@ -731,7 +731,7 @@
             InstallApk& apk = installApks[i];
             if (!apk.file.fileInfo.exists || apk.file.HasChanged()) {
                 // It didn't exist before or it changed, so int needs install
-                err = run_adb("install", "-r", apk.file.filename.c_str(), NULL);
+                err = run_adb("install", "-r", "-g", apk.file.filename.c_str(), NULL);
                 check_error(err);
                 apk.installed = true;
             } else {