Adding  min_sdk fields to compile with Bluetooth Apex am: ff95f54366 am: a2054f4dfe am: d2d923b4cd

Original change: https://android-review.googlesource.com/c/platform/external/fmtlib/+/1932111

Change-Id: I775861e257dc9181b4d8592ac42b89f6e1705d74