apk_helper: Extract all values from manifest rather than dump badging
apk_helper: Extract all values from manifest rather than dump badging

- dump xmltree and dump badging take the same amount of time to run
- Might as well speed things up by using only the (cached) manifest

BUG=540857

Review URL: https://codereview.chromium.org/1389363003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#353296}

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