AndroidFrameworkEfficientStrings: formatSimple

[AndroidFrameworkEfficientStrings] Simple format strings can be replaced
with TextUtils.formatSimple() for a 6x performance improvement

But since TextUtils doesn't expose this method, we have to integrate it
in the Bluetooth code directly

Bug: 344658662
Test: None
Flag: Exempt refactor
Change-Id: Ib407c721746ab423aa9bb1ec9236e8ebbc9787f9