tests: Hide new private APIs

Add missing @hide
This should have been done in If04e82a13250f520d70b58991586c8ce38f0ecb1 to avoid

/opt/jenkins/android/workspace/android/cm-11.0/out/target/common/obj/PACKAGING/public_api.txt:24102:
error 4: Added public method android.test.mock.MockPackageManager.getThemedResourcesForApplication
/opt/jenkins/android/workspace/android/cm-11.0/out/target/common/obj/PACKAGING/public_api.txt:24103:
error 4: Added public method android.test.mock.MockPackageManager.getThemedResourcesForApplication

Change-Id: Ib40279065c937b130322350c1dbdf5b0b43506e3
PackageManagerService: Prevent sending a SIGKILL while the device shutting down

This avoid potential NPE when cleanup theme related data

Change-Id: Ifc7b5f7a21af32464feb32012336cfbe4b7de2ff
Keyguard: Distinguish the TextView id of pinEntry

Both KeyguardSimPinView and KeyguardPinView have the same id of pinEntry
for their TextView of the password. When one of them is created in the
mSecurityViewContainer, the other one will get the wrong TextView of the
same id pinEntry.

Change the id pinEntry in KeyguardSimPinView to simPinEntry.

This fixes CYAN-3822,CYAN-3887

CRs-Fixed: 661955

Change-Id: Ia75d1d1f74530e6671d534000f9ce49cb1f814c4