Use snprintf when constructing file paths to avoid possible
buffer overflow.

Change-Id: I4781d28b6f66a758d45e9ce2b3dc6ddfde0c27e1

Fix the vintf manifest fragments to refer to the HAL's correct
name, "android.hardware.usb", without the trailing ".gadget",
which corresponds to the binary name. This allows Android hwbinder
to properly instantiate the service.

Change-Id: If88bf58bbbc1cf22ee0e873ad930a6fe09a0503a

Normally to enable this component for inclusion in a target's
vendor image, the PRODUCT_PACKAGES of the target's makefile must
include this module. Additionally, for a HAL it must also be
added to the vintf manifest.

To support self-containment of this component, vendor_product.mk
is defined with the above definitions, and is "picked up" by a
target via symlink defined in the top-level manifest. The vintf
xml files can live under /vendor/etc/vintf/manifest as vintf
fragments. Since USB Gadget HAL is optional, this can be
conditionally included.

Change-Id: I91d81ccfe45014777c3e10c93d86d1266fe1e409

Introduce a property ro.vendor.usb.use_gadget_hal to be defined
in a target's build/default.prop to allow USB HAL to be enabled
without USB Gadget HAL.

Change-Id: I57eb91138cc968086da0c7475da417be9e44e83b

Now that the module supports both the USB Gadget HAL (which handles
composition switching) as well as the USB 1.1 HAL (which supports
Type-C and dual-role functionality), rename this service by
dropping 'gadget' from the executable and service name.

Change-Id: Ibb98af880705d739d1569d4b0978ee670d954062

Add implementation for IUsb (not to be confused with IUsbGadget)
HAL which provides abstraction for querying and notification of
USB port status changes. It is primarily meant for Type-C ports
that support changing roles dynamically.

This implements version 1.1 of IUsb. Unlike the default 1.0
implementation bundled with AOSP, this version supports getting
port status using the Type-C connector class interface found
in upstream kernel.

This code is adopted from
https://android.googlesource.com/device/google/wahoo/+/refs/heads/master/usb/

Change-Id: I43c5e0214989d6ce650fbacb23d1bb0b592f2dfc

Some platforms support RNDIS/RMNET tethering over SW path. So,
add required support to add rules for RNDIS/RMNET over SW path
for those platforms.  Also fix NULL pointer dereference that
could be seen on some platforms where /sys/bus/esoc/ path not
exist.

Change-Id: I5f5721403d16d77ba8e88b466ec4401d7eef4974

Add implementation for USB Gadget HAL. This HAL is called by
the framework in order to configure the composition of USB
xgadget functions, which had previously been handled by init.rc
property triggers. The HAL implementation provides improved
performance and additional flexibility not offered by Android
init syntax.

Enablement of this HAL is done in the target-specific makefile
and manifest.

Change-Id: I909db39f93e13871d72607cc5de6aec98a383798