Move permission methods in PackageManager to PermissionManager.

A number of permission-related methods were implemented in
ApplicationPackageManager by calling the IPermissionManager AIDL
interface. However since we are moving permission into module, the
AIDL inteface can't be an API and the implementions must be moved.

This change moves these methods into PermissionManager, with the
javadoc and interface from PackageManager and the implementation from
AppliationManager. The javadoc remains mostly the same except for
style and typo fixes. The API interface also remains the same except
for inclusive language changes since we are defining new one and have
a chance to fix them now.

We have to lazily get the PermissionManager instance because the
context passed in may be null for an instrumentation use case.

Bug: 158736025
Test: presubmit
Change-Id: I1c28433ca6200679a41e3518354fe03b866621b5