pw_log: Fix AndroidManifest.xml format
pw_log: Fix AndroidManifest.xml format

<?xml?> declaration needs to go at the top of the file rather than after
the copyright.

Change-Id: I009a9809907bff57768cb60544fa27340b1e3e20
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/90000
Reviewed-by: Alexei Frolov <a1b001416a8cf9aaea32a3411f8f3c0793ebc0b5@google.com>
Commit-Queue: Anthony Stange <3bebc424bf227777417531d2ddb8779ff751e32b@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed