DO NOT MERGE Fixing Install button not enabled on resume

In cases where an app had a long list of permissions the Install button
was not being enabled.

Test: Manually clicked on an apk that required a long list of
permissions. Checked that the install button is enabled. Switch out and
back to the activity to force a pause/resume. The button gets disabled
and enabled as expected. Also the existing test passes as before:
gts-tradefed run gts-dev -m PackageInstallerTapjacking

(Regression fix for FPIIM-1589)

FPIIM-2105

Bug: 35056974
Change-Id: I2ef7d5ce4e137969c70d2929271620c2bcb723f2
(cherry picked from commit 7c32a526bf600fb053f7739432117f109ee2f32a)
diff --git a/src/com/android/packageinstaller/PackageInstallerActivity.java b/src/com/android/packageinstaller/PackageInstallerActivity.java
index 6887598..3153867 100644
--- a/src/com/android/packageinstaller/PackageInstallerActivity.java
+++ b/src/com/android/packageinstaller/PackageInstallerActivity.java
@@ -570,7 +570,7 @@
         super.onResume();
 
         if (mOk != null) {
-            mOk.setEnabled(mOkCanInstall);
+            mOk.setEnabled(true);
         }
     }