Track libcore API update.

Bug: 3484927
Change-Id: I22fc7e003c3483a20988e91d2b8824626ec022b1
Merge "Track libcore API update."
Track libcore API update.

Bug: 3484927
Change-Id: I684d724000d09a52c840076fab5985242c77c908
Merge "Track libcore API update."
Track libcore API update.

Bug: 3484927
Change-Id: I77c22d3da7b70d3dae4cf6c1903add948ae39406
Merge "Track libcore API update."
Switch frameworks/base over from @hidden Charsets to public StandardCharsets.

Bug: 3484927
Change-Id: I5d136d2ee629588538602766a182ae14ce5fc63c
Merge "Switch frameworks/base over from @hidden Charsets to public StandardCharsets."