Remove `pack_relocations: false`.

This was added to be able to test on O, but the proper change for O
compatibility would be to say `sdk_version: "26"` and let the build
system adjust everything that needs changing.

Remove these so we can remove `pack_relocations` entirely.

Bug: http://b/147452927
Test: treehugger
Change-Id: I4096209180c67128499e0850f2f21762e520b99a

media/libaaudio/examples/input_monitor/Android.bp

@@ -5,7 +5,6 @@ cc_test {
     cflags: ["-Wall", "-Werror"],
     shared_libs: ["libaaudio"],
     header_libs: ["libaaudio_example_utils"],
-    pack_relocations: false,
 }
 
 cc_test {
@@ -15,5 +14,4 @@ cc_test {
     cflags: ["-Wall", "-Werror"],
     shared_libs: ["libaaudio"],
     header_libs: ["libaaudio_example_utils"],
-    pack_relocations: false,
 }

media/libaaudio/examples/loopback/Android.bp

@@ -9,5 +9,4 @@ cc_test {
         "libaudioutils",
         ],
     header_libs: ["libaaudio_example_utils"],
-    pack_relocations: false,
 }

media/libaaudio/examples/write_sine/Android.bp

@@ -4,7 +4,6 @@ cc_test {
     cflags: ["-Wall", "-Werror"],
     shared_libs: ["libaaudio"],
     header_libs: ["libaaudio_example_utils"],
-    pack_relocations: false,
 }
 
 cc_test {
@@ -13,5 +12,4 @@ cc_test {
     cflags: ["-Wall", "-Werror"],
     shared_libs: ["libaaudio"],
     header_libs: ["libaaudio_example_utils"],
-    pack_relocations: false,
 }