Enables the use of the blastula pool.

This commit adds the code necessar to initialize and use the blastula
pool during application launching.  Highlights include:
* Modifying ZygoteState to allow the creation of blastula session
sockets
* Modified application startup to track if a web view process is being
created.
* Initialization of the blastula pool during Zygote initialization.
* Blastula lifecycle management via reporting pipes and event FDs.
* Launching of applications via the blastula pool.

The creation, maintenance, and use of the blastula pool can be disabled
by setting Zygote.BLASTULA_POOL_ENABLED to false.  When this feature is
disabled applications will launch as they did before this patch.

Topic: zygote-prefork
Test: make & flash & launch app & check log message
Bug: 68253328
Change-Id: I46c32ad09400591e866b6c6121d5a9b0332092f3
Merged-In: I46c32ad09400591e866b6c6121d5a9b0332092f3

1 files changed, 4 insertions, 2 deletions

diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index c7afd411936c..64d14c0b51ca 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -498,7 +498,8 @@ public class Process {
                                   String[] zygoteArgs) {
         return ZYGOTE_PROCESS.start(processClass, niceName, uid, gid, gids,
                     runtimeFlags, mountExternal, targetSdkVersion, seInfo,
-                    abi, instructionSet, appDataDir, invokeWith, zygoteArgs);
+                    abi, instructionSet, appDataDir, invokeWith,
+                    /*useBlastulaPool=*/ true, zygoteArgs);
     }
 
     /** @hide */
@@ -515,7 +516,8 @@ public class Process {
                                   String[] zygoteArgs) {
         return WebViewZygote.getProcess().start(processClass, niceName, uid, gid, gids,
                     runtimeFlags, mountExternal, targetSdkVersion, seInfo,
-                    abi, instructionSet, appDataDir, invokeWith, zygoteArgs);
+                    abi, instructionSet, appDataDir, invokeWith,
+                    /*useBlastulaPool=*/ false, zygoteArgs);
     }
 
     /**