tree ef9830dc1f16cefc2248e880a02ef137508b8428
parent 7ee06167def672bf961d023fc281878400bf8806
author Seigo Nonaka <nona@google.com> 1536796208 -0700
committer Seigo Nonaka <nona@google.com> 1536861494 -0700

Create LocaleList and HashSet lazily to save OS boot time

Creating HashSet and LocaleList in Zygote make performance impact
to the boot time. Since this API is not called so frequently and less
application is expected to call this API. So let's make Set and
LocaleList only when it is requested.

Here is a result of boot time perf test:
Before: TOTAL_BOOT_TIME : 16229.5
After : TOTAL_BOOT_TIME : 11704.0

Bug: 114774424
Test: atest android.graphics.fonts
Test: atest TypefaceSystemFallbackTest
Change-Id: I07247a78f6091c8adfaac748fe4a77a4597b1ae2