freedreno: android: add adreno-pm4-pack.xml.h generation to android build

freedreno: android: add adreno-pm4-pack.xml.h generation to android build

Fixes the following building errors:

In file included from external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_blitter.c:40:
external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_pack.h:42:10: fatal error: 'adreno-pm4-pack.xml.h' file not found
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

In file included from external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_blend.c:36:
external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_pack.h:42:10: fatal error: 'adreno-pm4-pack.xml.h' file not found
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

In file included from external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_const.c:26:
external/mesa/src/gallium/drivers/freedreno/a6xx/fd6_pack.h:42:10: fatal error: 'adreno-pm4-pack.xml.h' file not found
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Fixes: ee293160 "freedreno/a6xx: add OUT_PKT()"
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4973>