Fix deprecated-literal-operator warning

Reduce warnings emitted during build.

frameworks/native/libs/math/include/math/quat.h:147:34: warning: identifier '_i' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  147 | constexpr inline quat operator"" _i(long double v) {
      |                       ~~~~~~~~~~~^~
      |                       operator""_i

Test: presubmit
Flag: EXEMPT, code warning cleanup
Change-Id: If8564c83fe8981b7a60d0b13a8ecfd95091a4f6e