The WebView native library has so far only depended on native libraries
that were already loaded by the zygote, and has only shipped a single
.so file in its APK. Splitting the code into multiple libraries worked,
but only the top-level library would have its RELRO section shared,
causing a memory regression.
To avoid this regression if we do decide to split up the native code in
future, load the native library using the new RESERVED_ADDRESS_RECURSIVE
flag in the linker, which means that any depended-upon libraries will
also be loaded into the reserved address region and will have their
RELRO sections saved and reused.
Fixes: 128623590
Test: tested manually with modified WebView
Change-Id: I19ee3ff971e8dcd1c683f94af304abf918860a10
d2f37cc575