Move merged AndroidManifest.xml file to manifest subdirectory

Some modules generate their own custom AndroidManifest.xml file
to $(intermediates.COMMON)/AndroidManifest.xml file.  Move the
build system's location to
$(intermediates.COMMON)/manifest/AndroidManifest.xml.

This location will also be used later for finding manifest files
from LOCAL_STATIC_ANDROID_LIBRARIES dependencies.

Bug: 78447299
Test: m checkbuild
Change-Id: I345f079bdd191451333b38d882418f2f7150b1e9
Merged-In: I345f079bdd191451333b38d882418f2f7150b1e9
(cherry picked from commit 0bcc120b)