PackageManager: Fix reconnection logic in Installer.

Change-Id: Id4b352647ed51aaf64bb85dff9030a25e295758f
Fix null check for BaseObj.equals.

Change-Id: I4f060697db175cbf0b5617c1220db853bbe53f1f
Avoid duplication of AppWindowToken in created Task

When WindowManagerService creates a new Task, it passes atoken to the
Task constructor. In this case atoken is added to mAppTokens list by
the Task constructor and then it is added manually again by calling
newTask.mAppTokens.add(atoken). As a result, the same atoken is present
in mAppTokens list twice.

When another window token is added to the list, it may be placed in
beetwen duplicated tokens and corresponding window will be hidden from
the screen by corresponding duplicated windows.
From user perspective it means that some windows will not be displayed
on the screen.

The issue is fixed by avoid adding atoken to mAppTokens list manually
when it was added already in Task constructor.

Change-Id: I10628e68186160fffdde07beb7d84ab3cecb7051
Harden NsdManager against null-dereference crashes

Due to race conditions or programming errors, the NsdManager
can attempt to process an asynchronous status message (and issue
a callback to the listener) after the listener has already been
removed from the NsdManager state.  This causes dereferencing of
null objects, and a crash.

Split out the three async-queue message cases:  these are ones
in which message.arg2 does not hold an NsdManager array index
and the code should not interpret this field as if it were.

Add an explicit check for "null listener" (the array index in the
message has already been released), log a warning, and exit early.

Safeguard accesses to the "NSD service type" string from a (possibly
null) NsdServiceInfo object... return a constant "?" string rather
than crashing.

Bug: 9016259

Change-Id: I40aabdfc65d86fdd0eaac7a1e7e56e6ff69796cf
Validate objects are from the correct context.

Change-Id: I7d87b0e253b8d2e36d1aed790cfe3a7dd23e158f
Fix descriptor leak after accepting connections

After accepting a connection on a listening socket and
storing the resulting FileDescriptor into a newly created
LocalSocketImpl, the new impl's "descriptor was created
locally and should be closed normally" flag should be set.

(cherrypicked from 3e7305c6bf6062b5cb1e2ddcec6c6d30b4a8bc0d)

Bug: 11805817
Change-Id: I0a1a7c62ec3fbcf647a44a22110ddc778d14e5f4