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