Remove unused native method Font$Builder.nGetReleaseNativeFont

The nGetReleaseNativeFont native method has been moved to the enclosing
Font class. JNI registration also does not occur for
Font$Builder.nGetReleaseNativeFont.

Test: m -j framework
Bug: 230032992
Change-Id: Ic987812cabe57c5c964b3cb8036cd7e297c11c36
1 file changed