Add concept of implicitly exposed components

Implicitly exposed components are those that can still be accessed
via generic startActivity() calls. However, they cannot be started
by specifying a package or component. Additionally, package info
can't be obtained if the package only has implicitly shared
components.

Change-Id: I404a4dff87559cfeee6ad78f7dcc7f5d849d6869
Fixes: b_37343345
Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.EphemeralTest
diff --git a/services/core/java/com/android/server/am/BroadcastQueue.java b/services/core/java/com/android/server/am/BroadcastQueue.java
index 349180f..d08298b 100644
--- a/services/core/java/com/android/server/am/BroadcastQueue.java
+++ b/services/core/java/com/android/server/am/BroadcastQueue.java
@@ -1180,7 +1180,7 @@
                 skip = true;
             }
             if (!skip && r.callerInstantApp
-                    && (info.activityInfo.flags & ActivityInfo.FLAG_VISIBLE_TO_EPHEMERAL) == 0
+                    && (info.activityInfo.flags & ActivityInfo.FLAG_VISIBLE_TO_INSTANT_APP) == 0
                     && r.callingUid != info.activityInfo.applicationInfo.uid) {
                 Slog.w(TAG, "Instant App Denial: receiving "
                         + r.intent