Build libminui with BOARD_VNDK_VERSION

Use libdrm_platform which is a platform variant of libdrm.

Bug: 63741047
Bug: 37342627
Test: BOARD_VNDK_VERSION=current m -j libminui
Test: ryu recovery graphics test shows various graphics
Change-Id: Ifd2c1432781a96538585cdf818aa728d628a2f5a
Merged-In: Ifd2c1432781a96538585cdf818aa728d628a2f5a
(cherry picked from commit a48c494f138ddb99320583d00120674be1e3297c)